84389790 has 16 divisors (see below), whose sum is σ = 202535568. Its totient is φ = 22503936.

The previous prime is 84389777. The next prime is 84389791. The reversal of 84389790 is 9798348.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84389791) 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, 1406467 + ... + 1406526.

It is an arithmetic number, because the mean of its divisors is an integer number (12658473).

Almost surely, 2^84389790 is an apocalyptic number.

84389790 is an abundant number, since it is smaller than the sum of its proper divisors (118145778).

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

84389790 is a wasteful number, since it uses less digits than its factorization.

84389790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2813003.

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 84389790 is about 9186.3915657890. The cubic root of 84389790 is about 438.6282866257.

The spelling of 84389790 in words is "eighty-four million, three hundred eighty-nine thousand, seven hundred ninety".