1958664 has 16 divisors (see below), whose sum is σ = 4896720. Its totient is φ = 652880.

The previous prime is 1958651. The next prime is 1958681. The reversal of 1958664 is 4668591.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40782 + ... + 40829.

It is an arithmetic number, because the mean of its divisors is an integer number (306045).

2^1958664 is an apocalyptic number.

It is an amenable number.

1958664 is an abundant number, since it is smaller than the sum of its proper divisors (2938056).

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

1958664 is a wasteful number, since it uses less digits than its factorization.

1958664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81620 (or 81616 counting only the distinct ones).

The product of its digits is 51840, while the sum is 39.

The square root of 1958664 is about 1399.5227758061. The cubic root of 1958664 is about 125.1180538046.

The spelling of 1958664 in words is "one million, nine hundred fifty-eight thousand, six hundred sixty-four".