671795390 has 48 divisors (see below), whose sum is σ = 1410364224. Its totient is φ = 229723200.

The previous prime is 671795387. The next prime is 671795401. The reversal of 671795390 is 93597176.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 209600 + ... + 212780.

It is an arithmetic number, because the mean of its divisors is an integer number (29382588).

Almost surely, 2^671795390 is an apocalyptic number.

671795390 is an abundant number, since it is smaller than the sum of its proper divisors (738568834).

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

671795390 is a wasteful number, since it uses less digits than its factorization.

671795390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3633 (or 3626 counting only the distinct ones).

The product of its (nonzero) digits is 357210, while the sum is 47.

The square root of 671795390 is about 25919.0159921244. The cubic root of 671795390 is about 875.8149207976.

The spelling of 671795390 in words is "six hundred seventy-one million, seven hundred ninety-five thousand, three hundred ninety".