16620456 has 32 divisors (see below), whose sum is σ = 41801760. Its totient is φ = 5506752.

The previous prime is 16620449. The next prime is 16620463. The reversal of 16620456 is 65402661.

It is an interprime number because it is at equal distance from previous prime (16620449) and next prime (16620463).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2151 + ... + 6153.

It is an arithmetic number, because the mean of its divisors is an integer number (1306305).

Almost surely, 2^16620456 is an apocalyptic number.

It is an amenable number.

16620456 is an abundant number, since it is smaller than the sum of its proper divisors (25181304).

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

16620456 is a wasteful number, since it uses less digits than its factorization.

16620456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4185 (or 4181 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 16620456 is about 4076.8193484627. The cubic root of 16620456 is about 255.2001811433.

The spelling of 16620456 in words is "sixteen million, six hundred twenty thousand, four hundred fifty-six".