856064437 has 8 divisors (see below), whose sum is σ = 901625760. Its totient is φ = 810553680.

The previous prime is 856064401. The next prime is 856064441. The reversal of 856064437 is 734460658.

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

It is not a de Polignac number, because 856064437 - 2¹⁵ = 856031669 is a prime.

It is a super-2 number, since 2×856064437² = 1465692640592253938, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 856064393 and 856064402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856064497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25023 + ... + 48355.

It is an arithmetic number, because the mean of its divisors is an integer number (112703220).

Almost surely, 2^856064437 is an apocalyptic number.

It is an amenable number.

856064437 is a deficient number, since it is larger than the sum of its proper divisors (45561323).

856064437 is a wasteful number, since it uses less digits than its factorization.

856064437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25283.

The product of its (nonzero) digits is 483840, while the sum is 43.

The square root of 856064437 is about 29258.5788615920. The cubic root of 856064437 is about 949.5157040322.

The spelling of 856064437 in words is "eight hundred fifty-six million, sixty-four thousand, four hundred thirty-seven".