632641840 has 20 divisors (see below), whose sum is σ = 1470892464. Its totient is φ = 253056704.

The previous prime is 632641813. The next prime is 632641847. The reversal of 632641840 is 48146236.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 632641796 and 632641805.

It is not an unprimeable number, because it can be changed into a prime (632641847) 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, 3953932 + ... + 3954091.

Almost surely, 2^632641840 is an apocalyptic number.

It is an amenable number.

632641840 is an abundant number, since it is smaller than the sum of its proper divisors (838250624).

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

632641840 is a wasteful number, since it uses less digits than its factorization.

632641840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7908036 (or 7908030 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 632641840 is about 25152.3724527131. The cubic root of 632641840 is about 858.4584969286.

The spelling of 632641840 in words is "six hundred thirty-two million, six hundred forty-one thousand, eight hundred forty".