632135640 has 32 divisors (see below), whose sum is σ = 1896407280. Its totient is φ = 168569472.

The previous prime is 632135597. The next prime is 632135659. The reversal of 632135640 is 46531236.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 632135598 and 632135607.

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, 2633779 + ... + 2634018.

Almost surely, 2^632135640 is an apocalyptic number.

632135640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

632135640 is an abundant number, since it is smaller than the sum of its proper divisors (1264271640).

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

632135640 is a wasteful number, since it uses less digits than its factorization.

632135640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5267811 (or 5267807 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 632135640 is about 25142.3077699721. The cubic root of 632135640 is about 858.2294744309.

Adding to 632135640 its reverse (46531236), we get a palindrome (678666876).

The spelling of 632135640 in words is "six hundred thirty-two million, one hundred thirty-five thousand, six hundred forty".