1985598880 has 48 divisors (see below), whose sum is σ = 4694215680. Its totient is φ = 793691392.

The previous prime is 1985598869. The next prime is 1985598919. The reversal of 1985598880 is 888955891.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292161 + ... + 298879.

It is an arithmetic number, because the mean of its divisors is an integer number (97796160).

Almost surely, 2^1985598880 is an apocalyptic number.

1985598880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1985598880 is an abundant number, since it is smaller than the sum of its proper divisors (2708616800).

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

1985598880 is a wasteful number, since it uses less digits than its factorization.

1985598880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8581 (or 8573 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 61.

The square root of 1985598880 is about 44560.0592459211. The cubic root of 1985598880 is about 1256.8897167402.

The spelling of 1985598880 in words is "one billion, nine hundred eighty-five million, five hundred ninety-eight thousand, eight hundred eighty".