630731532 has 12 divisors (see below), whose sum is σ = 1471706936. Its totient is φ = 210243840.

The previous prime is 630731513. The next prime is 630731533. The reversal of 630731532 is 235137036.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 630731532.

It is not an unprimeable number, because it can be changed into a prime (630731533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26280469 + ... + 26280492.

Almost surely, 2^630731532 is an apocalyptic number.

It is an amenable number.

630731532 is an abundant number, since it is smaller than the sum of its proper divisors (840975404).

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

630731532 is a wasteful number, since it uses less digits than its factorization.

630731532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52560968 (or 52560966 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 30.

The square root of 630731532 is about 25114.3690344790. The cubic root of 630731532 is about 857.5935665027.

Adding to 630731532 its reverse (235137036), we get a palindrome (865868568).

The spelling of 630731532 in words is "six hundred thirty million, seven hundred thirty-one thousand, five hundred thirty-two".