990415940 has 12 divisors (see below), whose sum is σ = 2079873516. Its totient is φ = 396166368.

The previous prime is 990415901. The next prime is 990415957. The reversal of 990415940 is 49514099.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 285407236 + 705008704 = 16894^2 + 26552^2 .

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, 24760379 + ... + 24760418.

It is an arithmetic number, because the mean of its divisors is an integer number (173322793).

Almost surely, 2^990415940 is an apocalyptic number.

It is an amenable number.

990415940 is an abundant number, since it is smaller than the sum of its proper divisors (1089457576).

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

990415940 is a wasteful number, since it uses less digits than its factorization.

990415940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49520806 (or 49520804 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 990415940 is about 31470.8744714855. The cubic root of 990415940 is about 996.7950526190.

The spelling of 990415940 in words is "nine hundred ninety million, four hundred fifteen thousand, nine hundred forty".