84135810 has 64 divisors (see below), whose sum is σ = 222009984. Its totient is φ = 20236800.

The previous prime is 84135787. The next prime is 84135823. The reversal of 84135810 is 1853148.

It is a super-2 number, since 2×84135810² = 14157669048712200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 44280 + ... + 46140.

It is an arithmetic number, because the mean of its divisors is an integer number (3468906).

Almost surely, 2^84135810 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84135810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111004992).

84135810 is an abundant number, since it is smaller than the sum of its proper divisors (137874174).

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

84135810 is a wasteful number, since it uses less digits than its factorization.

84135810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2019.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 84135810 is about 9172.5574405397. The cubic root of 84135810 is about 438.1878117018.

Adding to 84135810 its reverse (1853148), we get a palindrome (85988958).

The spelling of 84135810 in words is "eighty-four million, one hundred thirty-five thousand, eight hundred ten".