85404858 has 32 divisors (see below), whose sum is σ = 212958720. Its totient is φ = 22182960.

The previous prime is 85404811. The next prime is 85404859. The reversal of 85404858 is 85840458.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (85404859) 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, 91968 + ... + 92891.

It is an arithmetic number, because the mean of its divisors is an integer number (6654960).

Almost surely, 2^85404858 is an apocalyptic number.

85404858 is an abundant number, since it is smaller than the sum of its proper divisors (127553862).

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

85404858 is a wasteful number, since it uses less digits than its factorization.

85404858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184882.

The product of its (nonzero) digits is 204800, while the sum is 42.

The square root of 85404858 is about 9241.4748822902. The cubic root of 85404858 is about 440.3799369841.

Subtracting 85404858 from its reverse (85840458), we obtain a square (435600 = 660²).

The spelling of 85404858 in words is "eighty-five million, four hundred four thousand, eight hundred fifty-eight".