85188280 has 32 divisors (see below), whose sum is σ = 192057840. Its totient is φ = 34007040.

The previous prime is 85188253. The next prime is 85188281. The reversal of 85188280 is 8288158.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85188281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21235 + ... + 24925.

Almost surely, 2^85188280 is an apocalyptic number.

It is an amenable number.

85188280 is an abundant number, since it is smaller than the sum of its proper divisors (106869560).

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

85188280 is a wasteful number, since it uses less digits than its factorization.

85188280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4279 (or 4275 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 40.

The square root of 85188280 is about 9229.7497257510. The cubic root of 85188280 is about 440.0073690226.

The spelling of 85188280 in words is "eighty-five million, one hundred eighty-eight thousand, two hundred eighty".