990415938 has 8 divisors (see below), whose sum is σ = 1980831888. Its totient is φ = 330138644.

The previous prime is 990415901. The next prime is 990415957. The reversal of 990415938 is 839514099.

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

990415938 is an admirable number.

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 3 ways as a sum of consecutive naturals, for example, 82534656 + ... + 82534667.

It is an arithmetic number, because the mean of its divisors is an integer number (247603986).

Almost surely, 2^990415938 is an apocalyptic number.

990415938 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

990415938 is a wasteful number, since it uses less digits than its factorization.

990415938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165069328.

The product of its (nonzero) digits is 349920, while the sum is 48.

The square root of 990415938 is about 31470.8744397101. The cubic root of 990415938 is about 996.7950519481.

The spelling of 990415938 in words is "nine hundred ninety million, four hundred fifteen thousand, nine hundred thirty-eight".