657464 has 8 divisors (see below), whose sum is σ = 1232760. Its totient is φ = 328728.

The previous prime is 657451. The next prime is 657469. The reversal of 657464 is 464756.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×657464² = 864517822592, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 657464.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (657469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41084 + ... + 41099.

It is an arithmetic number, because the mean of its divisors is an integer number (154095).

2⁶⁵⁷⁴⁶⁴ is an apocalyptic number.

It is an amenable number.

657464 is a deficient number, since it is larger than the sum of its proper divisors (575296).

657464 is a wasteful number, since it uses less digits than its factorization.

657464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82189 (or 82185 counting only the distinct ones).

The product of its digits is 20160, while the sum is 32.

The square root of 657464 is about 810.8415381565. The cubic root of 657464 is about 86.9542190984.

The spelling of 657464 in words is "six hundred fifty-seven thousand, four hundred sixty-four".