990380618 has 8 divisors (see below), whose sum is σ = 1485706212. Its totient is φ = 495145216.

The previous prime is 990380609. The next prime is 990380623. The reversal of 990380618 is 816083099.

It can be written as a sum of positive squares in 2 ways, for example, as 795973369 + 194407249 = 28213^2 + 13943^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24746 + ... + 50922.

Almost surely, 2^990380618 is an apocalyptic number.

990380618 is a deficient number, since it is larger than the sum of its proper divisors (495325594).

990380618 is a wasteful number, since it uses less digits than its factorization.

990380618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45096.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 990380618 is about 31470.3132809319. The cubic root of 990380618 is about 996.7832026437.

The spelling of 990380618 in words is "nine hundred ninety million, three hundred eighty thousand, six hundred eighteen".