406624621 has 8 divisors (see below), whose sum is σ = 438788000. Its totient is φ = 374587632.

The previous prime is 406624607. The next prime is 406624633. The reversal of 406624621 is 126426604.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406624621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406624601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24855 + ... + 37828.

It is an arithmetic number, because the mean of its divisors is an integer number (54848500).

Almost surely, 2^406624621 is an apocalyptic number.

It is an amenable number.

406624621 is a deficient number, since it is larger than the sum of its proper divisors (32163379).

406624621 is a wasteful number, since it uses less digits than its factorization.

406624621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63195.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 406624621 is about 20164.9354325770. The cubic root of 406624621 is about 740.8516011590.

The spelling of 406624621 in words is "four hundred six million, six hundred twenty-four thousand, six hundred twenty-one".