84272520 has 64 divisors (see below), whose sum is σ = 254160000. Its totient is φ = 22353408.

The previous prime is 84272479. The next prime is 84272549. The reversal of 84272520 is 2527248.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22116 + ... + 25644.

It is an arithmetic number, because the mean of its divisors is an integer number (3971250).

Almost surely, 2^84272520 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 84272520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127080000).

84272520 is an abundant number, since it is smaller than the sum of its proper divisors (169887480).

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

84272520 is a wasteful number, since it uses less digits than its factorization.

84272520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3742 (or 3738 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 84272520 is about 9180.0065359454. The cubic root of 84272520 is about 438.4250164432.

Adding to 84272520 its reverse (2527248), we get a palindrome (86799768).

The spelling of 84272520 in words is "eighty-four million, two hundred seventy-two thousand, five hundred twenty".