1988264880 has 480 divisors, whose sum is σ = 8341132800. Its totient is φ = 429981696.

The previous prime is 1988264857. The next prime is 1988264921. The reversal of 1988264880 is 884628891.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 95 ways as a sum of consecutive naturals, for example, 2585136 + ... + 2585904.

It is an arithmetic number, because the mean of its divisors is an integer number (17377360).

Almost surely, 2^1988264880 is an apocalyptic number.

1988264880 is a gapful number since it is divisible by the number (10) 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 1988264880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4170566400).

1988264880 is an abundant number, since it is smaller than the sum of its proper divisors (6352867920).

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

1988264880 is a wasteful number, since it uses less digits than its factorization.

1988264880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823 (or 805 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 54.

The square root of 1988264880 is about 44589.9638932350. The cubic root of 1988264880 is about 1257.4519936826.

The spelling of 1988264880 in words is "one billion, nine hundred eighty-eight million, two hundred sixty-four thousand, eight hundred eighty".