641672832 has 64 divisors (see below), whose sum is σ = 1744126560. Its totient is φ = 208911360.

The previous prime is 641672819. The next prime is 641672851. The reversal of 641672832 is 238276146.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2919 + ... + 35942.

Almost surely, 2^641672832 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641672832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (872063280).

641672832 is an abundant number, since it is smaller than the sum of its proper divisors (1102453728).

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

641672832 is a wasteful number, since it uses less digits than its factorization.

641672832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38921 (or 38909 counting only the distinct ones).

The product of its digits is 96768, while the sum is 39.

The square root of 641672832 is about 25331.2619504043. The cubic root of 641672832 is about 862.5240576360.

The spelling of 641672832 in words is "six hundred forty-one million, six hundred seventy-two thousand, eight hundred thirty-two".