85813138 has 32 divisors (see below), whose sum is σ = 139382784. Its totient is φ = 39517632.

The previous prime is 85813121. The next prime is 85813141. The reversal of 85813138 is 83131858.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a junction number, because it is equal to n+sod(n) for n = 85813097 and 85813106.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215956 + ... + 216352.

It is an arithmetic number, because the mean of its divisors is an integer number (4355712).

Almost surely, 2^85813138 is an apocalyptic number.

85813138 is a deficient number, since it is larger than the sum of its proper divisors (53569646).

85813138 is a wasteful number, since it uses less digits than its factorization.

85813138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586.

The product of its digits is 23040, while the sum is 37.

The square root of 85813138 is about 9263.5380929751. The cubic root of 85813138 is about 441.0805707002.

The spelling of 85813138 in words is "eighty-five million, eight hundred thirteen thousand, one hundred thirty-eight".