84149980 has 24 divisors (see below), whose sum is σ = 176999760. Its totient is φ = 33605760.

The previous prime is 84149971. The next prime is 84150007. The reversal of 84149980 is 8994148.

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, 10776 + ... + 16864.

It is an arithmetic number, because the mean of its divisors is an integer number (7374990).

Almost surely, 2^84149980 is an apocalyptic number.

It is an amenable number.

84149980 is an abundant number, since it is smaller than the sum of its proper divisors (92849780).

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

84149980 is a wasteful number, since it uses less digits than its factorization.

84149980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6789 (or 6787 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 84149980 is about 9173.3298207358. The cubic root of 84149980 is about 438.2124099188.

The spelling of 84149980 in words is "eighty-four million, one hundred forty-nine thousand, nine hundred eighty".