1988794290 has 64 divisors (see below), whose sum is σ = 5581863936. Its totient is φ = 444007872.

The previous prime is 1988794279. The next prime is 1988794309. The reversal of 1988794290 is 924978891.

It is a self number, because there is not a number n which added to its sum of digits gives 1988794290.

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 31 ways as a sum of consecutive naturals, for example, 101092 + ... + 119151.

It is an arithmetic number, because the mean of its divisors is an integer number (87216624).

Almost surely, 2^1988794290 is an apocalyptic number.

1988794290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1988794290 is an abundant number, since it is smaller than the sum of its proper divisors (3593069646).

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

1988794290 is a wasteful number, since it uses less digits than its factorization.

1988794290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220303.

The product of its (nonzero) digits is 2612736, while the sum is 57.

The square root of 1988794290 is about 44595.8999236477. The cubic root of 1988794290 is about 1257.5635899108.

The spelling of 1988794290 in words is "one billion, nine hundred eighty-eight million, seven hundred ninety-four thousand, two hundred ninety".