856290149 has 16 divisors (see below), whose sum is σ = 1033186560. Its totient is φ = 699140160.

The previous prime is 856290143. The next prime is 856290203. The reversal of 856290149 is 941092658.

It is not a de Polignac number, because 856290149 - 2¹⁶ = 856224613 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856290143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75629 + ... + 86210.

It is an arithmetic number, because the mean of its divisors is an integer number (64574160).

Almost surely, 2^856290149 is an apocalyptic number.

It is an amenable number.

856290149 is a deficient number, since it is larger than the sum of its proper divisors (176896411).

856290149 is a wasteful number, since it uses less digits than its factorization.

856290149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161900.

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 856290149 is about 29262.4358008693. The cubic root of 856290149 is about 949.5991472273.

The spelling of 856290149 in words is "eight hundred fifty-six million, two hundred ninety thousand, one hundred forty-nine".