86978934 has 96 divisors (see below), whose sum is σ = 229721856. Its totient is φ = 24144480.

The previous prime is 86978911. The next prime is 86978951. The reversal of 86978934 is 43987968.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 125529 + ... + 126219.

It is an arithmetic number, because the mean of its divisors is an integer number (2392936).

Almost surely, 2^86978934 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86978934, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114860928).

86978934 is an abundant number, since it is smaller than the sum of its proper divisors (142742922).

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

86978934 is a wasteful number, since it uses less digits than its factorization.

86978934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752 (or 740 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 86978934 is about 9326.2497285887. The cubic root of 86978934 is about 443.0689951256.

The spelling of 86978934 in words is "eighty-six million, nine hundred seventy-eight thousand, nine hundred thirty-four".