646954252 has 120 divisors (see below), whose sum is σ = 1422997632. Its totient is φ = 256838400.

The previous prime is 646954223. The next prime is 646954271. The reversal of 646954252 is 252459646.

It is a junction number, because it is equal to n+sod(n) for n = 646954199 and 646954208.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 12206658 + ... + 12206710.

Almost surely, 2^646954252 is an apocalyptic number.

646954252 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 646954252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (711498816).

646954252 is an abundant number, since it is smaller than the sum of its proper divisors (776043380).

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

646954252 is a wasteful number, since it uses less digits than its factorization.

646954252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 134 counting only the distinct ones).

The product of its digits is 518400, while the sum is 43.

The square root of 646954252 is about 25435.2953983240. The cubic root of 646954252 is about 864.8839885847.

The spelling of 646954252 in words is "six hundred forty-six million, nine hundred fifty-four thousand, two hundred fifty-two".