16620624 has 30 divisors (see below), whose sum is σ = 46515066. Its totient is φ = 5540160.

The previous prime is 16620601. The next prime is 16620671. The reversal of 16620624 is 42602661.

It is a happy number.

16620624 is a `hidden beast` number, since 16 + 6 + 20 + 624 = 666.

It can be written as a sum of positive squares in only one way, i.e., 13838400 + 2782224 = 3720^2 + 1668^2 .

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 in 5 ways as a sum of consecutive naturals, for example, 57567 + ... + 57854.

Almost surely, 2^16620624 is an apocalyptic number.

It is an amenable number.

16620624 is an abundant number, since it is smaller than the sum of its proper divisors (29894442).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16620624 is a wasteful number, since it uses less digits than its factorization.

16620624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115435 (or 115426 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 16620624 is about 4076.8399527085. The cubic root of 16620624 is about 255.2010409971.

The spelling of 16620624 in words is "sixteen million, six hundred twenty thousand, six hundred twenty-four".