72322456 has 8 divisors (see below), whose sum is σ = 135604620. Its totient is φ = 36161224.

The previous prime is 72322451. The next prime is 72322469. The reversal of 72322456 is 65422327.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72322451) by changing a digit.

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, 4520146 + ... + 4520161.

Almost surely, 2^72322456 is an apocalyptic number.

It is an amenable number.

72322456 is a deficient number, since it is larger than the sum of its proper divisors (63282164).

72322456 is a wasteful number, since it uses less digits than its factorization.

72322456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9040313 (or 9040309 counting only the distinct ones).

The product of its digits is 20160, while the sum is 31.

The square root of 72322456 is about 8504.2610496151. The cubic root of 72322456 is about 416.6368911700.

The spelling of 72322456 in words is "seventy-two million, three hundred twenty-two thousand, four hundred fifty-six".