630740 has 48 divisors (see below), whose sum is σ = 1499904. Its totient is φ = 220800.

The previous prime is 630737. The next prime is 630797. The reversal of 630740 is 47036.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10310 + ... + 10370.

It is an arithmetic number, because the mean of its divisors is an integer number (31248).

2⁶³⁰⁷⁴⁰ 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 630740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (749952).

630740 is an abundant number, since it is smaller than the sum of its proper divisors (869164).

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

630740 is a wasteful number, since it uses less digits than its factorization.

630740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 630740 is about 794.1914126960. The cubic root of 630740 is about 85.7597404411.

Adding to 630740 its reverse (47036), we get a palindrome (677776).

The spelling of 630740 in words is "six hundred thirty thousand, seven hundred forty".