84665220 has 48 divisors (see below), whose sum is σ = 240612288. Its totient is φ = 22239360.

The previous prime is 84665201. The next prime is 84665257. The reversal of 84665220 is 2256648.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6511 + ... + 14550.

It is an arithmetic number, because the mean of its divisors is an integer number (5012756).

Almost surely, 2^84665220 is an apocalyptic number.

It is an amenable number.

84665220 is an abundant number, since it is smaller than the sum of its proper divisors (155947068).

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

84665220 is a wasteful number, since it uses less digits than its factorization.

84665220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21140 (or 21138 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 84665220 is about 9201.3705500865. The cubic root of 84665220 is about 439.1049643246.

It can be divided in two parts, 846 and 65220, that added together give a palindrome (66066).

The spelling of 84665220 in words is "eighty-four million, six hundred sixty-five thousand, two hundred twenty".