85177540 has 24 divisors (see below), whose sum is σ = 204426432. Its totient is φ = 29203680.

The previous prime is 85177537. The next prime is 85177549. The reversal of 85177540 is 4577158.

It is a self number, because there is not a number n which added to its sum of digits gives 85177540.

It is not an unprimeable number, because it can be changed into a prime (85177549) 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, 304066 + ... + 304345.

It is an arithmetic number, because the mean of its divisors is an integer number (8517768).

Almost surely, 2^85177540 is an apocalyptic number.

It is an amenable number.

85177540 is an abundant number, since it is smaller than the sum of its proper divisors (119248892).

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

85177540 is a wasteful number, since it uses less digits than its factorization.

85177540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608427 (or 608425 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 37.

The square root of 85177540 is about 9229.1678931527. The cubic root of 85177540 is about 439.9888771293.

The spelling of 85177540 in words is "eighty-five million, one hundred seventy-seven thousand, five hundred forty".