85697980 has 48 divisors (see below), whose sum is σ = 191268000. Its totient is φ = 32161536.

The previous prime is 85697971. The next prime is 85698001. The reversal of 85697980 is 8979658.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40386 + ... + 42454.

It is an arithmetic number, because the mean of its divisors is an integer number (3984750).

Almost surely, 2^85697980 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 85697980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95634000).

85697980 is an abundant number, since it is smaller than the sum of its proper divisors (105570020).

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

85697980 is a wasteful number, since it uses less digits than its factorization.

85697980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2206 (or 2204 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 52.

The square root of 85697980 is about 9257.3203466230. The cubic root of 85697980 is about 440.8831778701.

The spelling of 85697980 in words is "eighty-five million, six hundred ninety-seven thousand, nine hundred eighty".