1988372808 has 48 divisors (see below), whose sum is σ = 5417455680. Its totient is φ = 658818144.

The previous prime is 1988372803. The next prime is 1988372831. The reversal of 1988372808 is 8082738891.

1988372808 is a `hidden beast` number, since 198 + 8 + 372 + 80 + 8 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1988372801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70660 + ... + 94707.

It is an arithmetic number, because the mean of its divisors is an integer number (112863660).

Almost surely, 2^1988372808 is an apocalyptic number.

1988372808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1988372808 is an abundant number, since it is smaller than the sum of its proper divisors (3429082872).

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

1988372808 is a wasteful number, since it uses less digits than its factorization.

1988372808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165546 (or 165539 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 54.

The square root of 1988372808 is about 44591.1741043001. The cubic root of 1988372808 is about 1257.4747458194.

The spelling of 1988372808 in words is "one billion, nine hundred eighty-eight million, three hundred seventy-two thousand, eight hundred eight".