646004004 has 24 divisors (see below), whose sum is σ = 1507968000. Its totient is φ = 215245344.

The previous prime is 646003987. The next prime is 646004027. The reversal of 646004004 is 400400646.

It is a super-3 number, since 3×646004004³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23197 + ... + 42779.

It is an arithmetic number, because the mean of its divisors is an integer number (62832000).

Almost surely, 2^646004004 is an apocalyptic number.

It is an amenable number.

646004004 is an abundant number, since it is smaller than the sum of its proper divisors (861963996).

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

646004004 is a wasteful number, since it uses less digits than its factorization.

646004004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22339 (or 22337 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 646004004 is about 25416.6088217921. The cubic root of 646004004 is about 864.4603331835.

The spelling of 646004004 in words is "six hundred forty-six million, four thousand, four".