86978530 has 16 divisors (see below), whose sum is σ = 156691584. Its totient is φ = 34762480.

The previous prime is 86978519. The next prime is 86978531. The reversal of 86978530 is 3587968.

It is not an unprimeable number, because it can be changed into a prime (86978531) 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, 12375 + ... + 18085.

It is an arithmetic number, because the mean of its divisors is an integer number (9793224).

Almost surely, 2^86978530 is an apocalyptic number.

86978530 is the 7615-th pentagonal number.

86978530 is a deficient number, since it is larger than the sum of its proper divisors (69713054).

86978530 is a wasteful number, since it uses less digits than its factorization.

86978530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7241.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 86978530 is about 9326.2280692679. The cubic root of 86978530 is about 443.0683091351.

The spelling of 86978530 in words is "eighty-six million, nine hundred seventy-eight thousand, five hundred thirty".