646002480 has 40 divisors (see below), whose sum is σ = 2002608432. Its totient is φ = 172267264.

The previous prime is 646002479. The next prime is 646002551. The reversal of 646002480 is 84200646.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 1345599 + ... + 1346078.

Almost surely, 2^646002480 is an apocalyptic number.

646002480 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

646002480 is an abundant number, since it is smaller than the sum of its proper divisors (1356605952).

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

646002480 is a wasteful number, since it uses less digits than its factorization.

646002480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2691693 (or 2691687 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 646002480 is about 25416.5788413783. The cubic root of 646002480 is about 864.4596533948.

The spelling of 646002480 in words is "six hundred forty-six million, two thousand, four hundred eighty".