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130038400 = 275240637
BaseRepresentation
bin1111100000000…
…11101010000000
3100001200122011001
413300003222000
5231242212100
620523101344
73136210462
oct760035200
9301618131
10130038400
1167448858
1237671854
1320c300cb
14133b0132
15b639d6a
hex7c03a80

130038400 has 48 divisors (see below), whose sum is σ = 321243390. Its totient is φ = 52014080.

The previous prime is 130038383. The next prime is 130038401. The reversal of 130038400 is 4830031.

It can be written as a sum of positive squares in 3 ways, for example, as 49900096 + 80138304 = 7064^2 + 8952^2 .

It is not an unprimeable number, because it can be changed into a prime (130038401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17119 + ... + 23518.

Almost surely, 2130038400 is an apocalyptic number.

130038400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

130038400 is an abundant number, since it is smaller than the sum of its proper divisors (191204990).

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

130038400 is an equidigital number, since it uses as much as digits as its factorization.

130038400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40661 (or 40644 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 130038400 is about 11403.4380780535. The cubic root of 130038400 is about 506.6295756166.

Adding to 130038400 its reverse (4830031), we get a palindrome (134868431).

The spelling of 130038400 in words is "one hundred thirty million, thirty-eight thousand, four hundred".

Divisors: 1 2 4 5 8 10 16 20 25 32 40 50 64 80 100 128 160 200 320 400 640 800 1600 3200 40637 81274 162548 203185 325096 406370 650192 812740 1015925 1300384 1625480 2031850 2600768 3250960 4063700 5201536 6501920 8127400 13003840 16254800 26007680 32509600 65019200 130038400