408428664 has 64 divisors (see below), whose sum is σ = 1217687040. Its totient is φ = 111619200.

The previous prime is 408428651. The next prime is 408428677. The reversal of 408428664 is 466824804.

It is an interprime number because it is at equal distance from previous prime (408428651) and next prime (408428677).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48987 + ... + 56714.

It is an arithmetic number, because the mean of its divisors is an integer number (19026360).

Almost surely, 2^408428664 is an apocalyptic number.

It is an amenable number.

408428664 is an abundant number, since it is smaller than the sum of its proper divisors (809258376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

408428664 is a wasteful number, since it uses less digits than its factorization.

408428664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105740 (or 105736 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 42.

The square root of 408428664 is about 20209.6181062384. The cubic root of 408428664 is about 741.9456129931.

The spelling of 408428664 in words is "four hundred eight million, four hundred twenty-eight thousand, six hundred sixty-four".