637398 has 24 divisors (see below), whose sum is σ = 1462968. Its totient is φ = 199872.

The previous prime is 637379. The next prime is 637409. The reversal of 637398 is 893736.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 736 + ... + 1347.

It is an arithmetic number, because the mean of its divisors is an integer number (60957).

2⁶³⁷³⁹⁸ is an apocalyptic number.

637398 is an abundant number, since it is smaller than the sum of its proper divisors (825570).

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

637398 is a wasteful number, since it uses less digits than its factorization.

637398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2108 (or 2105 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 637398 is about 798.3720937007. The cubic root of 637398 is about 86.0604406565.

It can be divided in two parts, 637 and 398, that added together give a triangular number (1035 = T₄₅).

The spelling of 637398 in words is "six hundred thirty-seven thousand, three hundred ninety-eight".