85890831 has 8 divisors (see below), whose sum is σ = 123330480. Its totient is φ = 52855872.

The previous prime is 85890829. The next prime is 85890839. The reversal of 85890831 is 13809858.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85890831 - 2¹ = 85890829 is a prime.

It is a super-2 number, since 2×85890831² = 14754469699741122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85890839) 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, 1101126 + ... + 1101203.

It is an arithmetic number, because the mean of its divisors is an integer number (15416310).

Almost surely, 2^85890831 is an apocalyptic number.

85890831 is a deficient number, since it is larger than the sum of its proper divisors (37439649).

85890831 is a wasteful number, since it uses less digits than its factorization.

85890831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2202345.

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 85890831 is about 9267.7306283685. The cubic root of 85890831 is about 441.2136448686.

The spelling of 85890831 in words is "eighty-five million, eight hundred ninety thousand, eight hundred thirty-one".