408287990 has 16 divisors (see below), whose sum is σ = 801729360. Its totient is φ = 148468320.

The previous prime is 408287989. The next prime is 408288043. The reversal of 408287990 is 99782804.

It is a congruent number.

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, 1855745 + ... + 1855964.

It is an arithmetic number, because the mean of its divisors is an integer number (50108085).

Almost surely, 2^408287990 is an apocalyptic number.

408287990 is a deficient number, since it is larger than the sum of its proper divisors (393441370).

408287990 is a wasteful number, since it uses less digits than its factorization.

408287990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3711727.

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 408287990 is about 20206.1374339580. The cubic root of 408287990 is about 741.8604210925.

The spelling of 408287990 in words is "four hundred eight million, two hundred eighty-seven thousand, nine hundred ninety".