84165980 has 24 divisors (see below), whose sum is σ = 187146288. Its totient is φ = 31685888.

The previous prime is 84165967. The next prime is 84166051. The reversal of 84165980 is 8956148.

It is a congruent 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, 123434 + ... + 124113.

It is an arithmetic number, because the mean of its divisors is an integer number (7797762).

Almost surely, 2^84165980 is an apocalyptic number.

It is an amenable number.

84165980 is an abundant number, since it is smaller than the sum of its proper divisors (102980308).

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

84165980 is a wasteful number, since it uses less digits than its factorization.

84165980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247573 (or 247571 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 84165980 is about 9174.2018726427. The cubic root of 84165980 is about 438.2401815801.

The spelling of 84165980 in words is "eighty-four million, one hundred sixty-five thousand, nine hundred eighty".