408490031 has 4 divisors (see below), whose sum is σ = 410747064. Its totient is φ = 406233000.

The previous prime is 408490021. The next prime is 408490087. The reversal of 408490031 is 130094804.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 408490031 - 2⁶ = 408489967 is a prime.

It is a super-2 number, since 2×408490031² = 333728210852761922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 408489976 and 408490003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408490021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1128245 + ... + 1128606.

It is an arithmetic number, because the mean of its divisors is an integer number (102686766).

Almost surely, 2^408490031 is an apocalyptic number.

408490031 is a deficient number, since it is larger than the sum of its proper divisors (2257033).

408490031 is a wasteful number, since it uses less digits than its factorization.

408490031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2257032.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 408490031 is about 20211.1363114497. The cubic root of 408490031 is about 741.9827706008.

The spelling of 408490031 in words is "four hundred eight million, four hundred ninety thousand, thirty-one".