670446990 has 32 divisors (see below), whose sum is σ = 1787859360. Its totient is φ = 178785792.

The previous prime is 670446983. The next prime is 670447007. The reversal of 670446990 is 99644076.

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

It is a congruent number.

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, 1241299 + ... + 1241838.

It is an arithmetic number, because the mean of its divisors is an integer number (55870605).

Almost surely, 2^670446990 is an apocalyptic number.

670446990 is an abundant number, since it is smaller than the sum of its proper divisors (1117412370).

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

670446990 is a wasteful number, since it uses less digits than its factorization.

670446990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2483153 (or 2483147 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 670446990 is about 25892.9911365991. The cubic root of 670446990 is about 875.2285617880.

The spelling of 670446990 in words is "six hundred seventy million, four hundred forty-six thousand, nine hundred ninety".