652981680 has 120 divisors (see below), whose sum is σ = 2361650928. Its totient is φ = 160731648.

The previous prime is 652981673. The next prime is 652981691. The reversal of 652981680 is 86189256.

It is a tau number, because it is divible by the number of its divisors (120).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25522 + ... + 44241.

Almost surely, 2^652981680 is an apocalyptic number.

652981680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

652981680 is an abundant number, since it is smaller than the sum of its proper divisors (1708669248).

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

652981680 is a wasteful number, since it uses less digits than its factorization.

652981680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69795 (or 69786 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 652981680 is about 25553.5062173472. The cubic root of 652981680 is about 867.5616225220.

It can be divided in two parts, 6529 and 81680, that added together give a square (88209 = 297²).

The spelling of 652981680 in words is "six hundred fifty-two million, nine hundred eighty-one thousand, six hundred eighty".