83981880 has 64 divisors (see below), whose sum is σ = 279943200. Its totient is φ = 22394880.

The previous prime is 83981861. The next prime is 83981893. The reversal of 83981880 is 8818938.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37801 + ... + 39960.

Almost surely, 2^83981880 is an apocalyptic number.

It is an amenable number.

83981880 is an abundant number, since it is smaller than the sum of its proper divisors (195961320).

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

83981880 is a wasteful number, since it uses less digits than its factorization.

83981880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77781 (or 77771 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 45.

The square root of 83981880 is about 9164.1628095533. The cubic root of 83981880 is about 437.9204208961.

The spelling of 83981880 in words is "eighty-three million, nine hundred eighty-one thousand, eight hundred eighty".