85177880 has 16 divisors (see below), whose sum is σ = 191650320. Its totient is φ = 34071136.

The previous prime is 85177877. The next prime is 85177909. The reversal of 85177880 is 8877158.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1064684 + ... + 1064763.

It is an arithmetic number, because the mean of its divisors is an integer number (11978145).

Almost surely, 2^85177880 is an apocalyptic number.

It is an amenable number.

85177880 is an abundant number, since it is smaller than the sum of its proper divisors (106472440).

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

85177880 is a wasteful number, since it uses less digits than its factorization.

85177880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2129458 (or 2129454 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 44.

The square root of 85177880 is about 9229.1863129964. The cubic root of 85177880 is about 439.9894625576.

The spelling of 85177880 in words is "eighty-five million, one hundred seventy-seven thousand, eight hundred eighty".