86428087 has 4 divisors (see below), whose sum is σ = 87645456. Its totient is φ = 85210720.

The previous prime is 86428079. The next prime is 86428103. The reversal of 86428087 is 78082468.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 86428087 - 2³ = 86428079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86428987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 608578 + ... + 608719.

It is an arithmetic number, because the mean of its divisors is an integer number (21911364).

Almost surely, 2^86428087 is an apocalyptic number.

86428087 is a deficient number, since it is larger than the sum of its proper divisors (1217369).

86428087 is a wasteful number, since it uses less digits than its factorization.

86428087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217368.

The product of its (nonzero) digits is 172032, while the sum is 43.

The square root of 86428087 is about 9296.6707481765. The cubic root of 86428087 is about 442.1316789953.

The spelling of 86428087 in words is "eighty-six million, four hundred twenty-eight thousand, eighty-seven".