86691500 has 192 divisors, whose sum is σ = 241532928. Its totient is φ = 26496000.

The previous prime is 86691499. The next prime is 86691503. The reversal of 86691500 is 519668.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (86691503) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1844477 + ... + 1844523.

It is an arithmetic number, because the mean of its divisors is an integer number (1257984).

Almost surely, 2^86691500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86691500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120766464).

86691500 is an abundant number, since it is smaller than the sum of its proper divisors (154841428).

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

86691500 is a wasteful number, since it uses less digits than its factorization.

86691500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 109 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 86691500 is about 9310.8270309355. The cubic root of 86691500 is about 442.5803954492.

The spelling of 86691500 in words is "eighty-six million, six hundred ninety-one thousand, five hundred".