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130245880 = 23531105037
BaseRepresentation
bin1111100001101…
…10010011111000
3100002002011202111
413300312103320
5231320332010
620531342104
73141033412
oct760662370
9302064674
10130245880
116757a726
1237751934
1320ca368b
14134259b2
15b67b58a
hex7c364f8

130245880 has 32 divisors (see below), whose sum is σ = 302509440. Its totient is φ = 50417280.

The previous prime is 130245851. The next prime is 130245881. The reversal of 130245880 is 88542031.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130245881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51279 + ... + 53758.

It is an arithmetic number, because the mean of its divisors is an integer number (9453420).

Almost surely, 2130245880 is an apocalyptic number.

130245880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

130245880 is an abundant number, since it is smaller than the sum of its proper divisors (172263560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

130245880 is a wasteful number, since it uses less digits than its factorization.

130245880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105079 (or 105075 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 130245880 is about 11412.5317086087. The cubic root of 130245880 is about 506.8988797834.

The spelling of 130245880 in words is "one hundred thirty million, two hundred forty-five thousand, eight hundred eighty".

Divisors: 1 2 4 5 8 10 20 31 40 62 124 155 248 310 620 1240 105037 210074 420148 525185 840296 1050370 2100740 3256147 4201480 6512294 13024588 16280735 26049176 32561470 65122940 130245880