670409872 has 40 divisors (see below), whose sum is σ = 1425756960. Its totient is φ = 302849280.

The previous prime is 670409869. The next prime is 670409917. The reversal of 670409872 is 278904076.

670409872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

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, 17004 + ... + 40372.

It is an arithmetic number, because the mean of its divisors is an integer number (35643924).

Almost surely, 2^670409872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 670409872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (712878480).

670409872 is an abundant number, since it is smaller than the sum of its proper divisors (755347088).

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

670409872 is a wasteful number, since it uses less digits than its factorization.

670409872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23551 (or 23545 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 670409872 is about 25892.2743690082. The cubic root of 670409872 is about 875.2124097114.

The spelling of 670409872 in words is "six hundred seventy million, four hundred nine thousand, eight hundred seventy-two".