671485890 has 32 divisors (see below), whose sum is σ = 1706365440. Its totient is φ = 168529664.

The previous prime is 671485877. The next prime is 671485921. The reversal of 671485890 is 98584176.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 657810 + ... + 658829.

It is an arithmetic number, because the mean of its divisors is an integer number (53323920).

Almost surely, 2^671485890 is an apocalyptic number.

671485890 is an abundant number, since it is smaller than the sum of its proper divisors (1034879550).

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

671485890 is a wasteful number, since it uses less digits than its factorization.

671485890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1316666.

The product of its (nonzero) digits is 483840, while the sum is 48.

The square root of 671485890 is about 25913.0447844324. The cubic root of 671485890 is about 875.6804024806.

The spelling of 671485890 in words is "six hundred seventy-one million, four hundred eighty-five thousand, eight hundred ninety".