85822780 has 24 divisors (see below), whose sum is σ = 180407808. Its totient is φ = 34294848.

The previous prime is 85822769. The next prime is 85822823. The reversal of 85822780 is 8722858.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30597 + ... + 33283.

It is an arithmetic number, because the mean of its divisors is an integer number (7516992).

Almost surely, 2^85822780 is an apocalyptic number.

It is an amenable number.

85822780 is an abundant number, since it is smaller than the sum of its proper divisors (94585028).

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

85822780 is a wasteful number, since it uses less digits than its factorization.

85822780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4293 (or 4291 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 40.

The square root of 85822780 is about 9264.0585058602. The cubic root of 85822780 is about 441.0970900805.

The spelling of 85822780 in words is "eighty-five million, eight hundred twenty-two thousand, seven hundred eighty".