630136400 has 30 divisors (see below), whose sum is σ = 1513903662. Its totient is φ = 252054400.

The previous prime is 630136393. The next prime is 630136427. The reversal of 630136400 is 4631036.

It can be written as a sum of positive squares in 3 ways, for example, as 327184 + 629809216 = 572^2 + 25096^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 787271 + ... + 788070.

Almost surely, 2^630136400 is an apocalyptic number.

It is an amenable number.

630136400 is an abundant number, since it is smaller than the sum of its proper divisors (883767262).

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

630136400 is a wasteful number, since it uses less digits than its factorization.

630136400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1575359 (or 1575348 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 630136400 is about 25102.5178020054. The cubic root of 630136400 is about 857.3237517677.

Adding to 630136400 its reverse (4631036), we get a palindrome (634767436).

The spelling of 630136400 in words is "six hundred thirty million, one hundred thirty-six thousand, four hundred".