990350402 has 24 divisors (see below), whose sum is σ = 1581176484. Its totient is φ = 465124352.

The previous prime is 990350401. The next prime is 990350407. The reversal of 990350402 is 204053099.

It can be written as a sum of positive squares in 6 ways, for example, as 300710281 + 689640121 = 17341^2 + 26261^2 .

It is not an unprimeable number, because it can be changed into a prime (990350401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 355238 + ... + 358014.

Almost surely, 2^990350402 is an apocalyptic number.

990350402 is a deficient number, since it is larger than the sum of its proper divisors (590826082).

990350402 is a wasteful number, since it uses less digits than its factorization.

990350402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3430 (or 3413 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 990350402 is about 31469.8332057861. The cubic root of 990350402 is about 996.7730654274.

The spelling of 990350402 in words is "nine hundred ninety million, three hundred fifty thousand, four hundred two".