637948 has 12 divisors (see below), whose sum is σ = 1142680. Its totient is φ = 311472.

The previous prime is 637939. The next prime is 638023. The reversal of 637948 is 849736.

It is a congruent number.

It is an unprimeable number.

637948 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1683 + ... + 2026.

2⁶³⁷⁹⁴⁸ is an apocalyptic number.

It is an amenable number.

637948 is a deficient number, since it is larger than the sum of its proper divisors (504732).

637948 is a wasteful number, since it uses less digits than its factorization.

637948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3756 (or 3754 counting only the distinct ones).

The product of its digits is 36288, while the sum is 37.

The square root of 637948 is about 798.7164703448. The cubic root of 637948 is about 86.0851869085.

The spelling of 637948 in words is "six hundred thirty-seven thousand, nine hundred forty-eight".