1990888704 has 432 divisors, whose sum is σ = 7078780800. Its totient is φ = 525533184.

The previous prime is 1990888699. The next prime is 1990888729. The reversal of 1990888704 is 4078880991.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 22369492 + ... + 22369580.

Almost surely, 2^1990888704 is an apocalyptic number.

1990888704 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1990888704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3539390400).

1990888704 is an abundant number, since it is smaller than the sum of its proper divisors (5087892096).

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

1990888704 is a wasteful number, since it uses less digits than its factorization.

1990888704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 54.

The square root of 1990888704 is about 44619.3758808883. The cubic root of 1990888704 is about 1258.0048848809.

The spelling of 1990888704 in words is "one billion, nine hundred ninety million, eight hundred eighty-eight thousand, seven hundred four".