85178720 has 48 divisors (see below), whose sum is σ = 219533328. Its totient is φ = 30973440.

The previous prime is 85178719. The next prime is 85178777. The reversal of 85178720 is 2787158.

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, 22439 + ... + 25958.

It is an arithmetic number, because the mean of its divisors is an integer number (4573611).

Almost surely, 2^85178720 is an apocalyptic number.

85178720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

85178720 is an abundant number, since it is smaller than the sum of its proper divisors (134354608).

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

85178720 is a wasteful number, since it uses less digits than its factorization.

85178720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48423 (or 48415 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 85178720 is about 9229.2318206880. The cubic root of 85178720 is about 439.9909089031.

The spelling of 85178720 in words is "eighty-five million, one hundred seventy-eight thousand, seven hundred twenty".