990392265 has 20 divisors (see below), whose sum is σ = 1775370564. Its totient is φ = 528208992.

The previous prime is 990392261. The next prime is 990392287. The reversal of 990392265 is 562293099.

990392265 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 170772624 + 819619641 = 13068^2 + 28629^2 .

It is not a de Polignac number, because 990392265 - 2² = 990392261 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 990392265.

It is not an unprimeable number, because it can be changed into a prime (990392261) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1222302 + ... + 1223111.

Almost surely, 2^990392265 is an apocalyptic number.

It is an amenable number.

990392265 is a deficient number, since it is larger than the sum of its proper divisors (784978299).

990392265 is a wasteful number, since it uses less digits than its factorization.

990392265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2445430 (or 2445421 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 45.

The square root of 990392265 is about 31470.4983277990. The cubic root of 990392265 is about 996.7871100601.

The spelling of 990392265 in words is "nine hundred ninety million, three hundred ninety-two thousand, two hundred sixty-five".