990615970 has 8 divisors (see below), whose sum is σ = 1783108764. Its totient is φ = 396246384.

The previous prime is 990615949. The next prime is 990615973. The reversal of 990615970 is 79516099.

990615970 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 964288809 + 26327161 = 31053^2 + 5131^2 .

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

It is a super-3 number, since 3×990615970³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 990615970.

It is not an unprimeable number, because it can be changed into a prime (990615973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49530789 + ... + 49530808.

Almost surely, 2^990615970 is an apocalyptic number.

990615970 is a deficient number, since it is larger than the sum of its proper divisors (792492794).

990615970 is a wasteful number, since it uses less digits than its factorization.

990615970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99061604.

The product of its (nonzero) digits is 153090, while the sum is 46.

The square root of 990615970 is about 31474.0523288629. The cubic root of 990615970 is about 996.8621542224.

The spelling of 990615970 in words is "nine hundred ninety million, six hundred fifteen thousand, nine hundred seventy".