856290441 has 4 divisors (see below), whose sum is σ = 1141720592. Its totient is φ = 570860292.

The previous prime is 856290389. The next prime is 856290469. The reversal of 856290441 is 144092658.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 856290441 - 2¹⁰ = 856289417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 856290441.

It is not an unprimeable number, because it can be changed into a prime (856290041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142715071 + ... + 142715076.

It is an arithmetic number, because the mean of its divisors is an integer number (285430148).

Almost surely, 2^856290441 is an apocalyptic number.

It is an amenable number.

856290441 is a deficient number, since it is larger than the sum of its proper divisors (285430151).

856290441 is a wasteful number, since it uses less digits than its factorization.

856290441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285430150.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 856290441 is about 29262.4407902007. The cubic root of 856290441 is about 949.5992551670.

The spelling of 856290441 in words is "eight hundred fifty-six million, two hundred ninety thousand, four hundred forty-one".