72395944 has 8 divisors (see below), whose sum is σ = 135742410. Its totient is φ = 36197968.

The previous prime is 72395923. The next prime is 72395957. The reversal of 72395944 is 44959327.

It can be written as a sum of positive squares in only one way, i.e., 72080100 + 315844 = 8490^2 + 562^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×72395944² = 10482345415302272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72395944.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4524739 + ... + 4524754.

Almost surely, 2^72395944 is an apocalyptic number.

It is an amenable number.

72395944 is a deficient number, since it is larger than the sum of its proper divisors (63346466).

72395944 is a wasteful number, since it uses less digits than its factorization.

72395944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9049499 (or 9049495 counting only the distinct ones).

The product of its digits is 272160, while the sum is 43.

The square root of 72395944 is about 8508.5806101841. The cubic root of 72395944 is about 416.7779605280. Note that the first 3 decimals are identical.

The spelling of 72395944 in words is "seventy-two million, three hundred ninety-five thousand, nine hundred forty-four".