72922072 has 8 divisors (see below), whose sum is σ = 136728900. Its totient is φ = 36461032.

The previous prime is 72922049. The next prime is 72922097. The reversal of 72922072 is 27022927.

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

It is a congruent number.

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 as a sum of consecutive naturals, namely, 4557622 + ... + 4557637.

Almost surely, 2^72922072 is an apocalyptic number.

It is an amenable number.

72922072 is a deficient number, since it is larger than the sum of its proper divisors (63806828).

72922072 is a wasteful number, since it uses less digits than its factorization.

72922072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9115265 (or 9115261 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 72922072 is about 8539.4421363459. The cubic root of 72922072 is about 417.7851509144.

Adding to 72922072 its reverse (27022927), we get a palindrome (99944999).

It can be divided in two parts, 729 and 22072, that added together give a square (22801 = 151²).

The spelling of 72922072 in words is "seventy-two million, nine hundred twenty-two thousand, seventy-two".