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152040520 = 23517223589
BaseRepresentation
bin10010000111111…
…11010001001000
3101121002110101101
421003333101020
5302410244040
623030431144
73524215552
oct1103772110
9347073341
10152040520
1178906325
1242b024b4
1325664908
141629a4d2
15d53409a
hex90ff448

152040520 has 32 divisors (see below), whose sum is σ = 362215800. Its totient is φ = 57238528.

The previous prime is 152040439. The next prime is 152040521. The reversal of 152040520 is 25040251.

It can be written as a sum of positive squares in 4 ways, for example, as 135443044 + 16597476 = 11638^2 + 4074^2 .

It is not an unprimeable number, because it can be changed into a prime (152040521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111115 + ... + 112474.

Almost surely, 2152040520 is an apocalyptic number.

152040520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

152040520 is an abundant number, since it is smaller than the sum of its proper divisors (210175280).

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

152040520 is a wasteful number, since it uses less digits than its factorization.

152040520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223617 (or 223613 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 152040520 is about 12330.4711994311. The cubic root of 152040520 is about 533.7277481779.

Adding to 152040520 its reverse (25040251), we get a palindrome (177080771).

The spelling of 152040520 in words is "one hundred fifty-two million, forty thousand, five hundred twenty".

Divisors: 1 2 4 5 8 10 17 20 34 40 68 85 136 170 340 680 223589 447178 894356 1117945 1788712 2235890 3801013 4471780 7602026 8943560 15204052 19005065 30408104 38010130 76020260 152040520