9990231602 has 8 divisors (see below), whose sum is σ = 16138066476. Its totient is φ = 4610876112.

The previous prime is 9990231599. The next prime is 9990231613. The reversal of 9990231602 is 2061320999.

It can be written as a sum of positive squares in 2 ways, for example, as 7974311401 + 2015920201 = 89299^2 + 44899^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 9990231602.

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, 192119813 + ... + 192119864.

Almost surely, 2^9990231602 is an apocalyptic number.

9990231602 is a deficient number, since it is larger than the sum of its proper divisors (6147834874).

9990231602 is a wasteful number, since it uses less digits than its factorization.

9990231602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384239692.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 9990231602 is about 99951.1460764708. The cubic root of 9990231602 is about 2153.7329489688.

The spelling of 9990231602 in words is "nine billion, nine hundred ninety million, two hundred thirty-one thousand, six hundred two".