1957664 has 24 divisors (see below), whose sum is σ = 3891888. Its totient is φ = 969280.

The previous prime is 1957663. The next prime is 1957667. The reversal of 1957664 is 4667591.

It is not an unprimeable number, because it can be changed into a prime (1957663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3959 + ... + 4425.

It is an arithmetic number, because the mean of its divisors is an integer number (162162).

2^1957664 is an apocalyptic number.

It is an amenable number.

1957664 is a deficient number, since it is larger than the sum of its proper divisors (1934224).

1957664 is a wasteful number, since it uses less digits than its factorization.

1957664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608 (or 600 counting only the distinct ones).

The product of its digits is 45360, while the sum is 38.

The square root of 1957664 is about 1399.1654655544. The cubic root of 1957664 is about 125.0967570852.

The spelling of 1957664 in words is "one million, nine hundred fifty-seven thousand, six hundred sixty-four".