408625690 has 16 divisors (see below), whose sum is σ = 802392480. Its totient is φ = 148591120.

The previous prime is 408625687. The next prime is 408625703. The reversal of 408625690 is 96526804.

It is a happy number.

It is a super-2 number, since 2×408625690² = 333949909055952200, which contains 22 as substring.

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, 1857280 + ... + 1857499.

It is an arithmetic number, because the mean of its divisors is an integer number (50149530).

Almost surely, 2^408625690 is an apocalyptic number.

408625690 is a deficient number, since it is larger than the sum of its proper divisors (393766790).

408625690 is a wasteful number, since it uses less digits than its factorization.

408625690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3714797.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 408625690 is about 20214.4920787043. The cubic root of 408625690 is about 742.0648986761.

The spelling of 408625690 in words is "four hundred eight million, six hundred twenty-five thousand, six hundred ninety".