85757778 has 40 divisors (see below), whose sum is σ = 192732672. Its totient is φ = 28500984.

The previous prime is 85757767. The next prime is 85757783. The reversal of 85757778 is 87775758.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 78351 + ... + 79437.

Almost surely, 2^85757778 is an apocalyptic number.

85757778 is an abundant number, since it is smaller than the sum of its proper divisors (106974894).

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

85757778 is a wasteful number, since it uses less digits than its factorization.

85757778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1588 (or 1579 counting only the distinct ones).

The product of its digits is 3841600, while the sum is 54.

The square root of 85757778 is about 9260.5495517275. The cubic root of 85757778 is about 440.9856999389.

The spelling of 85757778 in words is "eighty-five million, seven hundred fifty-seven thousand, seven hundred seventy-eight".