856946738 has 4 divisors (see below), whose sum is σ = 1285420110. Its totient is φ = 428473368.

The previous prime is 856946729. The next prime is 856946789. The reversal of 856946738 is 837649658.

856946738 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 837649658 = 2 ⋅418824829.

It can be written as a sum of positive squares in only one way, i.e., 793154569 + 63792169 = 28163^2 + 7987^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214236683 + ... + 214236686.

Almost surely, 2^856946738 is an apocalyptic number.

856946738 is a deficient number, since it is larger than the sum of its proper divisors (428473372).

856946738 is a wasteful number, since it uses less digits than its factorization.

856946738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428473371.

The product of its digits is 8709120, while the sum is 56.

The square root of 856946738 is about 29273.6526248434. The cubic root of 856946738 is about 949.8417974789.

The spelling of 856946738 in words is "eight hundred fifty-six million, nine hundred forty-six thousand, seven hundred thirty-eight".