84365780 has 12 divisors (see below), whose sum is σ = 177168180. Its totient is φ = 33746304.

The previous prime is 84365777. The next prime is 84365783. The reversal of 84365780 is 8756348.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (84365777) and next prime (84365783).

It can be written as a sum of positive squares in 2 ways, for example, as 35952016 + 48413764 = 5996^2 + 6958^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84365783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2109125 + ... + 2109164.

It is an arithmetic number, because the mean of its divisors is an integer number (14764015).

Almost surely, 2^84365780 is an apocalyptic number.

It is an amenable number.

84365780 is an abundant number, since it is smaller than the sum of its proper divisors (92802400).

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

84365780 is a wasteful number, since it uses less digits than its factorization.

84365780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4218298 (or 4218296 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 84365780 is about 9185.0846484940. The cubic root of 84365780 is about 438.5866841834.

The spelling of 84365780 in words is "eighty-four million, three hundred sixty-five thousand, seven hundred eighty".