990557602 has 8 divisors (see below), whose sum is σ = 1486135836. Its totient is φ = 495178992.

The previous prime is 990557597. The next prime is 990557641. The reversal of 990557602 is 206755099.

It is a happy number.

990557602 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 735548641 + 255008961 = 27121^2 + 15969^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36813 + ... + 57760.

Almost surely, 2^990557602 is an apocalyptic number.

990557602 is a deficient number, since it is larger than the sum of its proper divisors (495578234).

990557602 is a wasteful number, since it uses less digits than its factorization.

990557602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99812.

The product of its (nonzero) digits is 170100, while the sum is 43.

The square root of 990557602 is about 31473.1250752130. The cubic root of 990557602 is about 996.8425751609.

The spelling of 990557602 in words is "nine hundred ninety million, five hundred fifty-seven thousand, six hundred two".