646472232 has 128 divisors (see below), whose sum is σ = 2080761600. Its totient is φ = 182145024.

The previous prime is 646472227. The next prime is 646472269. The reversal of 646472232 is 232274646.

646472232 is a `hidden beast` number, since 6 + 4 + 647 + 2 + 2 + 3 + 2 = 666.

It is a super-3 number, since 3×646472232³ (a number of 27 digits) contains 333 as substring.

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

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 107448 + ... + 113304.

It is an arithmetic number, because the mean of its divisors is an integer number (16255950).

Almost surely, 2^646472232 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 646472232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1040380800).

646472232 is an abundant number, since it is smaller than the sum of its proper divisors (1434289368).

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

646472232 is a wasteful number, since it uses less digits than its factorization.

646472232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5952 (or 5942 counting only the distinct ones).

The product of its digits is 96768, while the sum is 36.

The square root of 646472232 is about 25425.8182169227. The cubic root of 646472232 is about 864.6691382774.

It can be divided in two parts, 646 and 472232, that added together give a triangular number (472878 = T₉₇₂).

The spelling of 646472232 in words is "six hundred forty-six million, four hundred seventy-two thousand, two hundred thirty-two".