630744 has 32 divisors (see below), whose sum is σ = 1617840. Its totient is φ = 204800.

The previous prime is 630737. The next prime is 630797. The reversal of 630744 is 447036.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 664 + ... + 1304.

2⁶³⁰⁷⁴⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 630744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (808920).

630744 is an abundant number, since it is smaller than the sum of its proper divisors (987096).

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

630744 is a wasteful number, since it uses less digits than its factorization.

630744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691 (or 687 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 630744 is about 794.1939309766. The cubic root of 630744 is about 85.7599217299.

The spelling of 630744 in words is "six hundred thirty thousand, seven hundred forty-four".