85420218 has 32 divisors (see below), whose sum is σ = 184508352. Its totient is φ = 26208000.

The previous prime is 85420217. The next prime is 85420241. The reversal of 85420218 is 81202458.

It is a super-2 number, since 2×85420218² = 14593227286335048, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85420211) 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, 29913 + ... + 32643.

It is an arithmetic number, because the mean of its divisors is an integer number (5765886).

Almost surely, 2^85420218 is an apocalyptic number.

85420218 is an abundant number, since it is smaller than the sum of its proper divisors (99088134).

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

85420218 is a wasteful number, since it uses less digits than its factorization.

85420218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3150.

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 85420218 is about 9242.3058811100. The cubic root of 85420218 is about 440.4063360693.

The spelling of 85420218 in words is "eighty-five million, four hundred twenty thousand, two hundred eighteen".