670987920 has 80 divisors (see below), whose sum is σ = 2082580992. Its totient is φ = 178713600.

The previous prime is 670987913. The next prime is 670987931. The reversal of 670987920 is 29789076.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 670987920.

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, 342945 + ... + 344895.

Almost surely, 2^670987920 is an apocalyptic number.

670987920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

670987920 is an abundant number, since it is smaller than the sum of its proper divisors (1411593072).

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

670987920 is a wasteful number, since it uses less digits than its factorization.

670987920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3400 (or 3394 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 48.

The square root of 670987920 is about 25903.4345213140. The cubic root of 670987920 is about 875.4638824640.

The spelling of 670987920 in words is "six hundred seventy million, nine hundred eighty-seven thousand, nine hundred twenty".