83989960 has 16 divisors (see below), whose sum is σ = 188977500. Its totient is φ = 33595968.

The previous prime is 83989957. The next prime is 83989993. The reversal of 83989960 is 6998938.

It can be written as a sum of positive squares in 2 ways, for example, as 78818884 + 5171076 = 8878^2 + 2274^2 .

It is a junction number, because it is equal to n+sod(n) for n = 83989898 and 83989907.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1049835 + ... + 1049914.

Almost surely, 2^83989960 is an apocalyptic number.

It is an amenable number.

83989960 is an abundant number, since it is smaller than the sum of its proper divisors (104987540).

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

83989960 is a wasteful number, since it uses less digits than its factorization.

83989960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2099760 (or 2099756 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 52.

The square root of 83989960 is about 9164.6036466396. The cubic root of 83989960 is about 437.9344647332.

The spelling of 83989960 in words is "eighty-three million, nine hundred eighty-nine thousand, nine hundred sixty".