84020860 has 48 divisors (see below), whose sum is σ = 219985920. Its totient is φ = 26187840.

The previous prime is 84020843. The next prime is 84020879. The reversal of 84020860 is 6802048.

It is a Harshad number since it is a multiple of its sum of digits (28).

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, 25740 + ... + 28819.

It is an arithmetic number, because the mean of its divisors is an integer number (4583040).

Almost surely, 2^84020860 is an apocalyptic number.

It is an amenable number.

84020860 is an abundant number, since it is smaller than the sum of its proper divisors (135965060).

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

84020860 is a wasteful number, since it uses less digits than its factorization.

84020860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54586 (or 54584 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 84020860 is about 9166.2893255668. The cubic root of 84020860 is about 437.9881636745.

The spelling of 84020860 in words is "eighty-four million, twenty thousand, eight hundred sixty".