84138810 has 64 divisors (see below), whose sum is σ = 232416000. Its totient is φ = 19095552.

The previous prime is 84138809. The next prime is 84138823. The reversal of 84138810 is 1883148.

It is a happy number.

It is a super-2 number, since 2×84138810² = 14158678696432200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29946 + ... + 32634.

It is an arithmetic number, because the mean of its divisors is an integer number (3631500).

Almost surely, 2^84138810 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84138810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116208000).

84138810 is an abundant number, since it is smaller than the sum of its proper divisors (148277190).

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

84138810 is a wasteful number, since it uses less digits than its factorization.

84138810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2855.

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 84138810 is about 9172.7209703555. The cubic root of 84138810 is about 438.1930197411.

It can be divided in two parts, 84138 and 810, that added together give a palindrome (84948).

The spelling of 84138810 in words is "eighty-four million, one hundred thirty-eight thousand, eight hundred ten".