84440290 has 32 divisors (see below), whose sum is σ = 170299584. Its totient is φ = 29874240.

The previous prime is 84440273. The next prime is 84440303. The reversal of 84440290 is 9204448.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6304 + ... + 14443.

It is an arithmetic number, because the mean of its divisors is an integer number (5321862).

Almost surely, 2^84440290 is an apocalyptic number.

84440290 is an abundant number, since it is smaller than the sum of its proper divisors (85859294).

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

84440290 is a wasteful number, since it uses less digits than its factorization.

84440290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20802.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 84440290 is about 9189.1397856383. The cubic root of 84440290 is about 438.7157628931.

The spelling of 84440290 in words is "eighty-four million, four hundred forty thousand, two hundred ninety".