646862046 has 32 divisors (see below), whose sum is σ = 1332855168. Its totient is φ = 209135520.

The previous prime is 646861981. The next prime is 646862093. The reversal of 646862046 is 640268646.

It is a super-2 number, since 2×646862046² = 836861013110612232, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 646861989 and 646862007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69081 + ... + 77883.

It is an arithmetic number, because the mean of its divisors is an integer number (41651724).

Almost surely, 2^646862046 is an apocalyptic number.

646862046 is an abundant number, since it is smaller than the sum of its proper divisors (685993122).

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

646862046 is a wasteful number, since it uses less digits than its factorization.

646862046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9176.

The product of its (nonzero) digits is 331776, while the sum is 42.

The square root of 646862046 is about 25433.4827736981. The cubic root of 646862046 is about 864.8428979503.

The spelling of 646862046 in words is "six hundred forty-six million, eight hundred sixty-two thousand, forty-six".