632561328 has 60 divisors (see below), whose sum is σ = 2023195408. Its totient is φ = 180731520.

The previous prime is 632561327. The next prime is 632561333. The reversal of 632561328 is 823165236.

It is a happy number.

632561328 is a `hidden beast` number, since 6 + 32 + 5 + 613 + 2 + 8 = 666.

632561328 is nontrivially palindromic in base 15.

It is a super-2 number, since 2×632561328² = 800267667362247168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 632561292 and 632561301.

It is not an unprimeable number, because it can be changed into a prime (632561323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 312763 + ... + 314778.

Almost surely, 2^632561328 is an apocalyptic number.

It is an amenable number.

632561328 is an abundant number, since it is smaller than the sum of its proper divisors (1390634080).

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

632561328 is a wasteful number, since it uses less digits than its factorization.

632561328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627562 (or 627553 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 632561328 is about 25150.7719165834. The cubic root of 632561328 is about 858.4220786698.

The spelling of 632561328 in words is "six hundred thirty-two million, five hundred sixty-one thousand, three hundred twenty-eight".