85823040 has 56 divisors (see below), whose sum is σ = 272491200. Its totient is φ = 22885888.

The previous prime is 85823027. The next prime is 85823041. The reversal of 85823040 is 4032858.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 85822989 and 85823007.

It is not an unprimeable number, because it can be changed into a prime (85823041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43740 + ... + 45659.

Almost surely, 2^85823040 is an apocalyptic number.

85823040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

85823040 is an abundant number, since it is smaller than the sum of its proper divisors (186668160).

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

85823040 is a wasteful number, since it uses less digits than its factorization.

85823040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89419 (or 89409 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 85823040 is about 9264.0725385761. The cubic root of 85823040 is about 441.0975355144.

Adding to 85823040 its reverse (4032858), we get a palindrome (89855898).

The spelling of 85823040 in words is "eighty-five million, eight hundred twenty-three thousand, forty".