389631490 has 16 divisors (see below), whose sum is σ = 708147648. Its totient is φ = 154339056.

The previous prime is 389631439. The next prime is 389631503. The reversal of 389631490 is 94136983.

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 7 ways as a sum of consecutive naturals, for example, 188112 + ... + 190171.

It is an arithmetic number, because the mean of its divisors is an integer number (44259228).

Almost surely, 2^389631490 is an apocalyptic number.

389631490 is a deficient number, since it is larger than the sum of its proper divisors (318516158).

389631490 is a wasteful number, since it uses less digits than its factorization.

389631490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378393.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 389631490 is about 19739.0853384852. The cubic root of 389631490 is about 730.3841663444.

The spelling of 389631490 in words is "three hundred eighty-nine million, six hundred thirty-one thousand, four hundred ninety".