85602780 has 216 divisors, whose sum is σ = 289860480. Its totient is φ = 20401920.

The previous prime is 85602779. The next prime is 85602799. The reversal of 85602780 is 8720658.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 71 ways as a sum of consecutive naturals, for example, 2761365 + ... + 2761395.

Almost surely, 2^85602780 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 85602780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144930240).

85602780 is an abundant number, since it is smaller than the sum of its proper divisors (204257700).

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

85602780 is a wasteful number, since it uses less digits than its factorization.

85602780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121 (or 93 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 85602780 is about 9252.1770411077. The cubic root of 85602780 is about 440.7198615738.

The spelling of 85602780 in words is "eighty-five million, six hundred two thousand, seven hundred eighty".