84280356 has 36 divisors (see below), whose sum is σ = 225575532. Its totient is φ = 26440704.

The previous prime is 84280331. The next prime is 84280367. The reversal of 84280356 is 65308248.

It can be written as a sum of positive squares in 2 ways, for example, as 37822500 + 46457856 = 6150^2 + 6816^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 84280356.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68245 + ... + 69468.

It is an arithmetic number, because the mean of its divisors is an integer number (6265987).

Almost surely, 2^84280356 is an apocalyptic number.

It is an amenable number.

84280356 is an abundant number, since it is smaller than the sum of its proper divisors (141295176).

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

84280356 is a wasteful number, since it uses less digits than its factorization.

84280356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137740 (or 137735 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 84280356 is about 9180.4333231063. The cubic root of 84280356 is about 438.4386048663.

The spelling of 84280356 in words is "eighty-four million, two hundred eighty thousand, three hundred fifty-six".