86357440 has 56 divisors (see below), whose sum is σ = 221467680. Its totient is φ = 31884288.

The previous prime is 86357437. The next prime is 86357441. The reversal of 86357440 is 4475368.

It is a self number, because there is not a number n which added to its sum of digits gives 86357440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86357441) 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, 6220 + ... + 14539.

It is an arithmetic number, because the mean of its divisors is an integer number (3954780).

Almost surely, 2^86357440 is an apocalyptic number.

86357440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

86357440 is an abundant number, since it is smaller than the sum of its proper divisors (135110240).

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

86357440 is a wasteful number, since it uses less digits than its factorization.

86357440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20789 (or 20779 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 86357440 is about 9292.8703854084. The cubic root of 86357440 is about 442.0111788496.

The spelling of 86357440 in words is "eighty-six million, three hundred fifty-seven thousand, four hundred forty".