1990430604 has 48 divisors (see below), whose sum is σ = 5162815840. Its totient is φ = 663163200.

The previous prime is 1990430599. The next prime is 1990430627. The reversal of 1990430604 is 4060340991.

1990430604 is a `hidden beast` number, since 1 + 9 + 9 + 0 + 43 + 0 + 604 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 387654 + ... + 392754.

Almost surely, 2^1990430604 is an apocalyptic number.

It is an amenable number.

1990430604 is an abundant number, since it is smaller than the sum of its proper divisors (3172385236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1990430604 is a wasteful number, since it uses less digits than its factorization.

1990430604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8727 (or 8719 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 1990430604 is about 44614.2421654790. The cubic root of 1990430604 is about 1257.9083892399.

The spelling of 1990430604 in words is "one billion, nine hundred ninety million, four hundred thirty thousand, six hundred four".