1400664 has 32 divisors (see below), whose sum is σ = 3708720. Its totient is φ = 439296.

The previous prime is 1400653. The next prime is 1400669. The reversal of 1400664 is 4660041.

It is a self number, because there is not a number n which added to its sum of digits gives 1400664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400669) 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, 1309 + ... + 2124.

2^1400664 is an apocalyptic number.

It is an amenable number.

1400664 is an abundant number, since it is smaller than the sum of its proper divisors (2308056).

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

1400664 is a wasteful number, since it uses less digits than its factorization.

1400664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3459 (or 3455 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1400664 is about 1183.4965145703. The cubic root of 1400664 is about 111.8865773523.

The spelling of 1400664 in words is "one million, four hundred thousand, six hundred sixty-four".