72243904 has 14 divisors (see below), whose sum is σ = 143359124. Its totient is φ = 36121920.

The previous prime is 72243893. The next prime is 72243911. The reversal of 72243904 is 40934227.

It is a super-2 number, since 2×72243904² = 10438363330322432, which contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 564342 + ... + 564469.

Almost surely, 2^72243904 is an apocalyptic number.

It is an amenable number.

72243904 is a deficient number, since it is larger than the sum of its proper divisors (71115220).

72243904 is a wasteful number, since it uses less digits than its factorization.

72243904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128823 (or 1128813 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 72243904 is about 8499.6414042005. The cubic root of 72243904 is about 416.4859951278.

The spelling of 72243904 in words is "seventy-two million, two hundred forty-three thousand, nine hundred four".