86731764 has 36 divisors (see below), whose sum is σ = 235416384. Its totient is φ = 24780336.

The previous prime is 86731753. The next prime is 86731783. The reversal of 86731764 is 46713768.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73164 + ... + 74339.

It is an arithmetic number, because the mean of its divisors is an integer number (6539344).

Almost surely, 2^86731764 is an apocalyptic number.

86731764 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

86731764 is an abundant number, since it is smaller than the sum of its proper divisors (148684620).

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

86731764 is a wasteful number, since it uses less digits than its factorization.

86731764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147524 (or 147515 counting only the distinct ones).

The product of its digits is 169344, while the sum is 42.

The square root of 86731764 is about 9312.9889938730. The cubic root of 86731764 is about 442.6489038916.

The spelling of 86731764 in words is "eighty-six million, seven hundred thirty-one thousand, seven hundred sixty-four".