83911880 has 48 divisors (see below), whose sum is σ = 204458580. Its totient is φ = 30980352.

The previous prime is 83911859. The next prime is 83911901. The reversal of 83911880 is 8811938.

It is an interprime number because it is at equal distance from previous prime (83911859) and next prime (83911901).

It can be written as a sum of positive squares in 6 ways, for example, as 4024036 + 79887844 = 2006^2 + 8938^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 554 + ... + 12966.

Almost surely, 2^83911880 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83911880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102229290).

83911880 is an abundant number, since it is smaller than the sum of its proper divisors (120546700).

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

83911880 is a wasteful number, since it uses less digits than its factorization.

83911880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12450 (or 12433 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 38.

The square root of 83911880 is about 9160.3427883459. The cubic root of 83911880 is about 437.7987162682.

The spelling of 83911880 in words is "eighty-three million, nine hundred eleven thousand, eight hundred eighty".