85205428 has 48 divisors (see below), whose sum is σ = 196850304. Its totient is φ = 31242240.

The previous prime is 85205389. The next prime is 85205429. The reversal of 85205428 is 82450258.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 85205393 and 85205402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85205429) 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, 2901 + ... + 13372.

It is an arithmetic number, because the mean of its divisors is an integer number (4101048).

Almost surely, 2^85205428 is an apocalyptic number.

It is an amenable number.

85205428 is an abundant number, since it is smaller than the sum of its proper divisors (111644876).

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

85205428 is a wasteful number, since it uses less digits than its factorization.

85205428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16312 (or 16310 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 34.

The square root of 85205428 is about 9230.6786316067. The cubic root of 85205428 is about 440.0368908463.

The spelling of 85205428 in words is "eighty-five million, two hundred five thousand, four hundred twenty-eight".