408890631 has 8 divisors (see below), whose sum is σ = 545284224. Its totient is φ = 272545400.

The previous prime is 408890617. The next prime is 408890641. The reversal of 408890631 is 136098804.

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

It is a cyclic number.

It is not a de Polignac number, because 408890631 - 2⁶ = 408890567 is a prime.

It is a super-2 number, since 2×408890631² = 334383096239156322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 408890631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408890641) 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, 19240 + ... + 34466.

It is an arithmetic number, because the mean of its divisors is an integer number (68160528).

Almost surely, 2^408890631 is an apocalyptic number.

408890631 is a deficient number, since it is larger than the sum of its proper divisors (136393593).

408890631 is a wasteful number, since it uses less digits than its factorization.

408890631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24181.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 408890631 is about 20221.0442608684. The cubic root of 408890631 is about 742.2252417854.

The spelling of 408890631 in words is "four hundred eight million, eight hundred ninety thousand, six hundred thirty-one".