85891418 has 4 divisors (see below), whose sum is σ = 128837130. Its totient is φ = 42945708.

The previous prime is 85891411. The next prime is 85891423. The reversal of 85891418 is 81419858.

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

It can be written as a sum of positive squares in only one way, i.e., 75047569 + 10843849 = 8663^2 + 3293^2 .

It is not an unprimeable number, because it can be changed into a prime (85891411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21472853 + ... + 21472856.

Almost surely, 2^85891418 is an apocalyptic number.

85891418 is a deficient number, since it is larger than the sum of its proper divisors (42945712).

85891418 is a wasteful number, since it uses less digits than its factorization.

85891418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42945711.

The product of its digits is 92160, while the sum is 44.

The square root of 85891418 is about 9267.7622973402. The cubic root of 85891418 is about 441.2146499888.

The spelling of 85891418 in words is "eighty-five million, eight hundred ninety-one thousand, four hundred eighteen".