84392490 has 128 divisors (see below), whose sum is σ = 262563840. Its totient is φ = 16858368.

The previous prime is 84392467. The next prime is 84392501. The reversal of 84392490 is 9429348.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 51057 + ... + 52683.

It is an arithmetic number, because the mean of its divisors is an integer number (2051280).

Almost surely, 2^84392490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84392490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131281920).

84392490 is an abundant number, since it is smaller than the sum of its proper divisors (178171350).

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

84392490 is a wasteful number, since it uses less digits than its factorization.

84392490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1676.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 84392490 is about 9186.5385211188. The cubic root of 84392490 is about 438.6329644576.

The spelling of 84392490 in words is "eighty-four million, three hundred ninety-two thousand, four hundred ninety".