84399078 has 16 divisors (see below), whose sum is σ = 168888240. Its totient is φ = 28118016.

The previous prime is 84399059. The next prime is 84399079. The reversal of 84399078 is 87099348.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84399079) 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, 19758 + ... + 23646.

It is an arithmetic number, because the mean of its divisors is an integer number (10555515).

Almost surely, 2^84399078 is an apocalyptic number.

84399078 is an abundant number, since it is smaller than the sum of its proper divisors (84489162).

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

84399078 is a wasteful number, since it uses less digits than its factorization.

84399078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7511.

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

The square root of 84399078 is about 9186.8970822580. The cubic root of 84399078 is about 438.6443779486.

The spelling of 84399078 in words is "eighty-four million, three hundred ninety-nine thousand, seventy-eight".