406623731 has 16 divisors (see below), whose sum is σ = 454348800. Its totient is φ = 361646208.

The previous prime is 406623689. The next prime is 406623733. The reversal of 406623731 is 137326604.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406623731 is a prime.

It is a super-2 number, since 2×406623731² = 330685717224720722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (406623733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148190 + ... + 150908.

It is an arithmetic number, because the mean of its divisors is an integer number (28396800).

Almost surely, 2^406623731 is an apocalyptic number.

406623731 is a deficient number, since it is larger than the sum of its proper divisors (47725069).

406623731 is a wasteful number, since it uses less digits than its factorization.

406623731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3218.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 406623731 is about 20164.9133645548. The cubic root of 406623731 is about 740.8510606454.

The spelling of 406623731 in words is "four hundred six million, six hundred twenty-three thousand, seven hundred thirty-one".