84427820 has 24 divisors (see below), whose sum is σ = 180306000. Its totient is φ = 33198272.

The previous prime is 84427807. The next prime is 84427823. The reversal of 84427820 is 2872448.

It is not an unprimeable number, because it can be changed into a prime (84427823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34595 + ... + 36954.

It is an arithmetic number, because the mean of its divisors is an integer number (7512750).

Almost surely, 2^84427820 is an apocalyptic number.

It is an amenable number.

84427820 is an abundant number, since it is smaller than the sum of its proper divisors (95878180).

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

84427820 is a wasteful number, since it uses less digits than its factorization.

84427820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71617 (or 71615 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 35.

The square root of 84427820 is about 9188.4612422320. The cubic root of 84427820 is about 438.6941655613.

The spelling of 84427820 in words is "eighty-four million, four hundred twenty-seven thousand, eight hundred twenty".