86257506 has 16 divisors (see below), whose sum is σ = 172950048. Its totient is φ = 28680000.

The previous prime is 86257499. The next prime is 86257537. The reversal of 86257506 is 60575268.

It is a happy 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, 15520 + ... + 20331.

It is an arithmetic number, because the mean of its divisors is an integer number (10809378).

Almost surely, 2^86257506 is an apocalyptic number.

86257506 is an abundant number, since it is smaller than the sum of its proper divisors (86692542).

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

86257506 is a wasteful number, since it uses less digits than its factorization.

86257506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36257.

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 86257506 is about 9287.4919111674. The cubic root of 86257506 is about 441.8406125965.

Adding to 86257506 its sum of digits (39), we get a triangular number (86257545 = T₁₃₁₃₄).

The spelling of 86257506 in words is "eighty-six million, two hundred fifty-seven thousand, five hundred six".