990280964 has 6 divisors (see below), whose sum is σ = 1732991694. Its totient is φ = 495140480.

The previous prime is 990280961. The next prime is 990280999. The reversal of 990280964 is 469082099.

It can be written as a sum of positive squares in only one way, i.e., 821280964 + 169000000 = 28658^2 + 13000^2 .

It is not an unprimeable number, because it can be changed into a prime (990280961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123785117 + ... + 123785124.

It is an arithmetic number, because the mean of its divisors is an integer number (288831949).

Almost surely, 2^990280964 is an apocalyptic number.

It is an amenable number.

990280964 is a deficient number, since it is larger than the sum of its proper divisors (742710730).

990280964 is a wasteful number, since it uses less digits than its factorization.

990280964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247570245 (or 247570243 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 990280964 is about 31468.7299394176. The cubic root of 990280964 is about 996.7497687755.

The spelling of 990280964 in words is "nine hundred ninety million, two hundred eighty thousand, nine hundred sixty-four".