72152402 has 12 divisors (see below), whose sum is σ = 125898750. Its totient is φ = 30922416.

The previous prime is 72152393. The next prime is 72152413. The reversal of 72152402 is 20425127.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 49294441 + 22857961 = 7021^2 + 4781^2 .

It is a super-2 number, since 2×72152402² = 10411938228739208, which contains 22 as substring.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 368027 + ... + 368222.

Almost surely, 2^72152402 is an apocalyptic number.

72152402 is a deficient number, since it is larger than the sum of its proper divisors (53746348).

72152402 is a wasteful number, since it uses less digits than its factorization.

72152402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736265 (or 736258 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 72152402 is about 8494.2570010567. The cubic root of 72152402 is about 416.3100845429.

Adding to 72152402 its reverse (20425127), we get a palindrome (92577529).

The spelling of 72152402 in words is "seventy-two million, one hundred fifty-two thousand, four hundred two".