86281389 has 16 divisors (see below), whose sum is σ = 129922240. Its totient is φ = 56576880.

The previous prime is 86281381. The next prime is 86281397. The reversal of 86281389 is 98318268.

86281389 is a `hidden beast` number, since 8 + 628 + 13 + 8 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (86281381) and next prime (86281397).

It is not a de Polignac number, because 86281389 - 2³ = 86281381 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86281381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24547 + ... + 27840.

It is an arithmetic number, because the mean of its divisors is an integer number (8120140).

Almost surely, 2^86281389 is an apocalyptic number.

It is an amenable number.

86281389 is a deficient number, since it is larger than the sum of its proper divisors (43640851).

86281389 is a wasteful number, since it uses less digits than its factorization.

86281389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52457 (or 52451 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 86281389 is about 9288.7775837297. Note that the first 3 decimals coincide. The cubic root of 86281389 is about 441.8813878135.

The spelling of 86281389 in words is "eighty-six million, two hundred eighty-one thousand, three hundred eighty-nine".