85620780 has 96 divisors (see below), whose sum is σ = 304442880. Its totient is φ = 19569600.

The previous prime is 85620779. The next prime is 85620781. The reversal of 85620780 is 8702658.

It is an interprime number because it is at equal distance from previous prime (85620779) and next prime (85620781).

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

It is not an unprimeable number, because it can be changed into a prime (85620781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7546 + ... + 15105.

It is an arithmetic number, because the mean of its divisors is an integer number (3171280).

Almost surely, 2^85620780 is an apocalyptic number.

It is an amenable number.

85620780 is an abundant number, since it is smaller than the sum of its proper divisors (218822100).

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

85620780 is a wasteful number, since it uses less digits than its factorization.

85620780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22676 (or 22668 counting only the distinct ones).

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

The square root of 85620780 is about 9253.1497340095. The cubic root of 85620780 is about 440.7507499848.

The spelling of 85620780 in words is "eighty-five million, six hundred twenty thousand, seven hundred eighty".