86257787 has 12 divisors (see below), whose sum is σ = 109463256. Its totient is φ = 67213440.

The previous prime is 86257783. The next prime is 86257799. The reversal of 86257787 is 78775268.

It is not a de Polignac number, because 86257787 - 2² = 86257783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86257781) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79478 + ... + 80555.

It is an arithmetic number, because the mean of its divisors is an integer number (9121938).

Almost surely, 2^86257787 is an apocalyptic number.

86257787 is a deficient number, since it is larger than the sum of its proper divisors (23205469).

86257787 is a wasteful number, since it uses less digits than its factorization.

86257787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160058 (or 160051 counting only the distinct ones).

The product of its digits is 1317120, while the sum is 50.

The square root of 86257787 is about 9287.5070390283. The cubic root of 86257787 is about 441.8410923888.

The spelling of 86257787 in words is "eighty-six million, two hundred fifty-seven thousand, seven hundred eighty-seven".