670490538 has 32 divisors (see below), whose sum is σ = 1360281600. Its totient is φ = 220290096.

The previous prime is 670490497. The next prime is 670490539. The reversal of 670490538 is 835094076.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 670490538.

It is not an unprimeable number, because it can be changed into a prime (670490539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 465223 + ... + 466661.

It is an arithmetic number, because the mean of its divisors is an integer number (42508800).

Almost surely, 2^670490538 is an apocalyptic number.

670490538 is an abundant number, since it is smaller than the sum of its proper divisors (689791062).

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

670490538 is a wasteful number, since it uses less digits than its factorization.

670490538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2506.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 670490538 is about 25893.8320454891. The cubic root of 670490538 is about 875.2475111500.

The spelling of 670490538 in words is "six hundred seventy million, four hundred ninety thousand, five hundred thirty-eight".