85220406 has 24 divisors (see below), whose sum is σ = 184882464. Its totient is φ = 28370160.

The previous prime is 85220393. The next prime is 85220413. The reversal of 85220406 is 60402258.

It is a self number, because there is not a number n which added to its sum of digits gives 85220406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13800 + ... + 18996.

It is an arithmetic number, because the mean of its divisors is an integer number (7703436).

Almost surely, 2^85220406 is an apocalyptic number.

85220406 is an abundant number, since it is smaller than the sum of its proper divisors (99662058).

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

85220406 is a wasteful number, since it uses less digits than its factorization.

85220406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6116 (or 6113 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 85220406 is about 9231.4899122514. The cubic root of 85220406 is about 440.0626735792.

The spelling of 85220406 in words is "eighty-five million, two hundred twenty thousand, four hundred six".