85864044 has 24 divisors (see below), whose sum is σ = 228971008. Its totient is φ = 24532560.

The previous prime is 85864043. The next prime is 85864069. The reversal of 85864044 is 44046858.

It is a junction number, because it is equal to n+sod(n) for n = 85863993 and 85864011.

It is not an unprimeable number, because it can be changed into a prime (85864043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 511012 + ... + 511179.

Almost surely, 2^85864044 is an apocalyptic number.

85864044 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

85864044 is an abundant number, since it is smaller than the sum of its proper divisors (143106964).

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

85864044 is a wasteful number, since it uses less digits than its factorization.

85864044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022205 (or 1022203 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 39.

The square root of 85864044 is about 9266.2853398760. The cubic root of 85864044 is about 441.1677726118.

The spelling of 85864044 in words is "eighty-five million, eight hundred sixty-four thousand, forty-four".