990046225 has 81 divisors (see below), whose sum is σ = 1528283601. Its totient is φ = 634334400.

The previous prime is 990046219. The next prime is 990046261. The reversal of 990046225 is 522640099.

The square root of 990046225 is 31465.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 13608721 + 976437504 = 3689^2 + 31248^2 .

It is not a de Polignac number, because 990046225 - 2⁵ = 990046193 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 31936960 + ... + 31936990.

Almost surely, 2^990046225 is an apocalyptic number.

990046225 is the 31465-th square number.

990046225 is the 15733-rd centered octagonal number.

It is an amenable number.

990046225 is a deficient number, since it is larger than the sum of its proper divisors (538237376).

990046225 is a wasteful number, since it uses less digits than its factorization.

990046225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The cubic root of 990046225 is about 996.6710050904.

The spelling of 990046225 in words is "nine hundred ninety million, forty-six thousand, two hundred twenty-five".