84442780 has 96 divisors (see below), whose sum is σ = 194322240. Its totient is φ = 30750720.

The previous prime is 84442759. The next prime is 84442801. The reversal of 84442780 is 8724448.

It is an interprime number because it is at equal distance from previous prime (84442759) and next prime (84442801).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1260307 + ... + 1260373.

It is an arithmetic number, because the mean of its divisors is an integer number (2024190).

Almost surely, 2^84442780 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 84442780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97161120).

84442780 is an abundant number, since it is smaller than the sum of its proper divisors (109879460).

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

84442780 is a wasteful number, since it uses less digits than its factorization.

84442780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 37.

The square root of 84442780 is about 9189.2752706620. The cubic root of 84442780 is about 438.7200751770.

The spelling of 84442780 in words is "eighty-four million, four hundred forty-two thousand, seven hundred eighty".