84278988 has 96 divisors (see below), whose sum is σ = 229824000. Its totient is φ = 26671680.

The previous prime is 84278983. The next prime is 84278993. The reversal of 84278988 is 88987248.

It is an interprime number because it is at equal distance from previous prime (84278983) and next prime (84278993).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (84278983) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 222183 + ... + 222561.

It is an arithmetic number, because the mean of its divisors is an integer number (2394000).

Almost surely, 2^84278988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84278988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114912000).

84278988 is an abundant number, since it is smaller than the sum of its proper divisors (145545012).

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

84278988 is a wasteful number, since it uses less digits than its factorization.

84278988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492 (or 484 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 54.

The square root of 84278988 is about 9180.3588165169. The cubic root of 84278988 is about 438.4362326755.

The spelling of 84278988 in words is "eighty-four million, two hundred seventy-eight thousand, nine hundred eighty-eight".