72919724 has 6 divisors (see below), whose sum is σ = 127609524. Its totient is φ = 36459860.

The previous prime is 72919703. The next prime is 72919741. The reversal of 72919724 is 42791927.

It is a super-2 number, since 2×72919724² = 10634572296472352, which contains 22 as substring.

It is a plaindrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9114962 + ... + 9114969.

It is an arithmetic number, because the mean of its divisors is an integer number (21268254).

Almost surely, 2^72919724 is an apocalyptic number.

It is an amenable number.

72919724 is a deficient number, since it is larger than the sum of its proper divisors (54689800).

72919724 is a wasteful number, since it uses less digits than its factorization.

72919724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18229935 (or 18229933 counting only the distinct ones).

The product of its digits is 63504, while the sum is 41.

The square root of 72919724 is about 8539.3046555326. The cubic root of 72919724 is about 417.7806668123.

The spelling of 72919724 in words is "seventy-two million, nine hundred nineteen thousand, seven hundred twenty-four".