856354387 has 8 divisors (see below), whose sum is σ = 978982400. Its totient is φ = 733799304.

The previous prime is 856354363. The next prime is 856354399. The reversal of 856354387 is 783453658.

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

It is not a de Polignac number, because 856354387 - 2¹⁵ = 856321619 is a prime.

It is a super-2 number, since 2×856354387² = 1466685672268291538, which contains 22 as substring.

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 856354387.

It is not an unprimeable number, because it can be changed into a prime (856354327) 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, 9814 + ... + 42532.

It is an arithmetic number, because the mean of its divisors is an integer number (122372800).

Almost surely, 2^856354387 is an apocalyptic number.

856354387 is a deficient number, since it is larger than the sum of its proper divisors (122628013).

856354387 is a wasteful number, since it uses less digits than its factorization.

856354387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36465.

The product of its digits is 2419200, while the sum is 49.

The square root of 856354387 is about 29263.5333990959. The cubic root of 856354387 is about 949.6228926150.

The spelling of 856354387 in words is "eight hundred fifty-six million, three hundred fifty-four thousand, three hundred eighty-seven".