990814870 has 64 divisors (see below), whose sum is σ = 1916006400. Its totient is φ = 368081280.

The previous prime is 990814837. The next prime is 990814879. The reversal of 990814870 is 78418099.

It is a happy number.

990814870 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

990814870 is a nontrivial binomial coefficient, being equal to C(44516, 2).

It is a super-2 number, since 2×990814870² = 1963428213226233800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 990814870.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990814879) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2759751 + ... + 2760109.

It is an arithmetic number, because the mean of its divisors is an integer number (29937600).

Almost surely, 2^990814870 is an apocalyptic number.

990814870 is the 44515-th triangular number and also the 22258-th hexagonal number.

990814870 is the 14839-th centered nonagonal number.

990814870 is a deficient number, since it is larger than the sum of its proper divisors (925191530).

990814870 is a wasteful number, since it uses less digits than its factorization.

990814870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 990814870 is about 31477.2119159242. The cubic root of 990814870 is about 996.9288678025.

The spelling of 990814870 in words is "nine hundred ninety million, eight hundred fourteen thousand, eight hundred seventy".