72690344 has 16 divisors (see below), whose sum is σ = 136943520. Its totient is φ = 36172080.

The previous prime is 72690337. The next prime is 72690347. The reversal of 72690344 is 44309627.

It is a super-2 number, since 2×72690344² = 10567772221676672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72690347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19844 + ... + 23219.

It is an arithmetic number, because the mean of its divisors is an integer number (8558970).

Almost surely, 2^72690344 is an apocalyptic number.

It is an amenable number.

72690344 is a deficient number, since it is larger than the sum of its proper divisors (64253176).

72690344 is a wasteful number, since it uses less digits than its factorization.

72690344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43280 (or 43276 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 72690344 is about 8525.8632407516. The cubic root of 72690344 is about 417.3421426234.

The spelling of 72690344 in words is "seventy-two million, six hundred ninety thousand, three hundred forty-four".