84990708 has 72 divisors (see below), whose sum is σ = 243079200. Its totient is φ = 25751520.

The previous prime is 84990707. The next prime is 84990709. The reversal of 84990708 is 80709948.

It is an interprime number because it is at equal distance from previous prime (84990707) and next prime (84990709).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84990707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6718 + ... + 14666.

It is an arithmetic number, because the mean of its divisors is an integer number (3376100).

Almost surely, 2^84990708 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 84990708, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121539600).

84990708 is an abundant number, since it is smaller than the sum of its proper divisors (158088492).

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

84990708 is a wasteful number, since it uses less digits than its factorization.

84990708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7979 (or 7965 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 84990708 is about 9219.0405140665. The cubic root of 84990708 is about 439.6669449295. Note that the first 3 decimals are identical.

The spelling of 84990708 in words is "eighty-four million, nine hundred ninety thousand, seven hundred eight".