990879512 has 32 divisors (see below), whose sum is σ = 2159308800. Its totient is φ = 417463584.

The previous prime is 990879509. The next prime is 990879517. The reversal of 990879512 is 215978099.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990879517) by changing a digit.

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, 146648 + ... + 153255.

It is an arithmetic number, because the mean of its divisors is an integer number (67478400).

Almost surely, 2^990879512 is an apocalyptic number.

It is an amenable number.

990879512 is an abundant number, since it is smaller than the sum of its proper divisors (1168429288).

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

990879512 is a wasteful number, since it uses less digits than its factorization.

990879512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299975 (or 299971 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 50.

The square root of 990879512 is about 31478.2387054930. The cubic root of 990879512 is about 996.9505476260.

The spelling of 990879512 in words is "nine hundred ninety million, eight hundred seventy-nine thousand, five hundred twelve".