86143974 has 32 divisors (see below), whose sum is σ = 200620800. Its totient is φ = 24147552.

The previous prime is 86143961. The next prime is 86144021. The reversal of 86143974 is 47934168.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17124 + ... + 21575.

It is an arithmetic number, because the mean of its divisors is an integer number (6269400).

Almost surely, 2^86143974 is an apocalyptic number.

86143974 is an abundant number, since it is smaller than the sum of its proper divisors (114476826).

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

86143974 is a wasteful number, since it uses less digits than its factorization.

86143974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38764.

The product of its digits is 145152, while the sum is 42.

The square root of 86143974 is about 9281.3778072008. The cubic root of 86143974 is about 441.6466775020.

The spelling of 86143974 in words is "eighty-six million, one hundred forty-three thousand, nine hundred seventy-four".