981897888 has 48 divisors (see below), whose sum is σ = 2612808576. Its totient is φ = 322813440.

The previous prime is 981897869. The next prime is 981897893. The reversal of 981897888 is 888798189.

It is a tau number, because it is divible by the number of its divisors (48).

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, 63048 + ... + 77063.

It is an arithmetic number, because the mean of its divisors is an integer number (54433512).

Almost surely, 2^981897888 is an apocalyptic number.

It is an amenable number.

981897888 is an abundant number, since it is smaller than the sum of its proper divisors (1630910688).

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

981897888 is a wasteful number, since it uses less digits than its factorization.

981897888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140197 (or 140189 counting only the distinct ones).

The product of its digits is 18579456, while the sum is 66.

The square root of 981897888 is about 31335.2499271986. The cubic root of 981897888 is about 993.9291824202.

The spelling of 981897888 in words is "nine hundred eighty-one million, eight hundred ninety-seven thousand, eight hundred eighty-eight".