646619232 has 192 divisors, whose sum is σ = 2020515840. Its totient is φ = 177240576.

The previous prime is 646619227. The next prime is 646619333. The reversal of 646619232 is 232916646.

It is a congruent number.

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, 1863283 + ... + 1863629.

It is an arithmetic number, because the mean of its divisors is an integer number (10523520).

Almost surely, 2^646619232 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 646619232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1010257920).

646619232 is an abundant number, since it is smaller than the sum of its proper divisors (1373896608).

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

646619232 is a wasteful number, since it uses less digits than its factorization.

646619232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473 (or 465 counting only the distinct ones).

The product of its digits is 93312, while the sum is 39.

The square root of 646619232 is about 25428.7088150382. The cubic root of 646619232 is about 864.7346717601.

The spelling of 646619232 in words is "six hundred forty-six million, six hundred nineteen thousand, two hundred thirty-two".