616720324 has 48 divisors (see below), whose sum is σ = 1219792896. Its totient is φ = 270295200.

The previous prime is 616720301. The next prime is 616720337. The reversal of 616720324 is 423027616.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (31).

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 in 15 ways as a sum of consecutive naturals, for example, 472657 + ... + 473959.

It is an arithmetic number, because the mean of its divisors is an integer number (25412352).

Almost surely, 2^616720324 is an apocalyptic number.

It is an amenable number.

616720324 is a deficient number, since it is larger than the sum of its proper divisors (603072572).

616720324 is a wasteful number, since it uses less digits than its factorization.

616720324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1696 (or 1694 counting only the distinct ones).

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

The square root of 616720324 is about 24833.8543927438. The cubic root of 616720324 is about 851.1956985321.

The spelling of 616720324 in words is "six hundred sixteen million, seven hundred twenty thousand, three hundred twenty-four".