670519944 has 80 divisors (see below), whose sum is σ = 1886561820. Its totient is φ = 222497280.

The previous prime is 670519921. The next prime is 670519961. The reversal of 670519944 is 449915076.

It can be written as a sum of positive squares in 2 ways, for example, as 639584100 + 30935844 = 25290^2 + 5562^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 670519944.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 148764 + ... + 153204.

Almost surely, 2^670519944 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 670519944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (943280910).

670519944 is an abundant number, since it is smaller than the sum of its proper divisors (1216041876).

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

670519944 is a wasteful number, since it uses less digits than its factorization.

670519944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4692 (or 4679 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 670519944 is about 25894.3998578843. The cubic root of 670519944 is about 875.2603063353.

The spelling of 670519944 in words is "six hundred seventy million, five hundred nineteen thousand, nine hundred forty-four".