84138510 has 16 divisors (see below), whose sum is σ = 201932496. Its totient is φ = 22436928.

The previous prime is 84138499. The next prime is 84138521. The reversal of 84138510 is 1583148.

It is an interprime number because it is at equal distance from previous prime (84138499) and next prime (84138521).

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 2804617 = 84138510 / (8 + 4 + 1 + 3 + 8 + 5 + 1 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1402279 + ... + 1402338.

It is an arithmetic number, because the mean of its divisors is an integer number (12620781).

Almost surely, 2^84138510 is an apocalyptic number.

84138510 is an abundant number, since it is smaller than the sum of its proper divisors (117793986).

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

84138510 is a wasteful number, since it uses less digits than its factorization.

84138510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2804627.

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

The square root of 84138510 is about 9172.7046175051. The cubic root of 84138510 is about 438.1924989427.

It can be divided in two parts, 84138 and 510, that added together give a palindrome (84648).

The spelling of 84138510 in words is "eighty-four million, one hundred thirty-eight thousand, five hundred ten".