646508058 has 96 divisors (see below), whose sum is σ = 1594059264. Its totient is φ = 173926368.

The previous prime is 646508029. The next prime is 646508063. The reversal of 646508058 is 850805646.

It is a super-3 number, since 3×646508058³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 452341 + ... + 453767.

It is an arithmetic number, because the mean of its divisors is an integer number (16604784).

Almost surely, 2^646508058 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 646508058, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (797029632).

646508058 is an abundant number, since it is smaller than the sum of its proper divisors (947551206).

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

646508058 is a wasteful number, since it uses less digits than its factorization.

646508058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1536 (or 1529 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 42.

The square root of 646508058 is about 25426.5227272626. The cubic root of 646508058 is about 864.6851106388.

The spelling of 646508058 in words is "six hundred forty-six million, five hundred eight thousand, fifty-eight".