938631890 has 16 divisors (see below), whose sum is σ = 1930900032. Its totient is φ = 321816624.

The previous prime is 938631851. The next prime is 938631929. The reversal of 938631890 is 98136839.

It is an interprime number because it is at equal distance from previous prime (938631851) and next prime (938631929).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6704444 + ... + 6704583.

It is an arithmetic number, because the mean of its divisors is an integer number (120681252).

Almost surely, 2^938631890 is an apocalyptic number.

938631890 is an abundant number, since it is smaller than the sum of its proper divisors (992268142).

938631890 is a wasteful number, since it uses less digits than its factorization.

938631890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13409041.

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 938631890 is about 30637.0998953883. The cubic root of 938631890 is about 979.1106362828.

The spelling of 938631890 in words is "nine hundred thirty-eight million, six hundred thirty-one thousand, eight hundred ninety".