856653936 has 40 divisors (see below), whose sum is σ = 2343202704. Its totient is φ = 268753920.

The previous prime is 856653923. The next prime is 856653937. The reversal of 856653936 is 639356658.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856653937) 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, 524095 + ... + 525726.

Almost surely, 2^856653936 is an apocalyptic number.

It is an amenable number.

856653936 is an abundant number, since it is smaller than the sum of its proper divisors (1486548768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

856653936 is a wasteful number, since it uses less digits than its factorization.

856653936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049849 (or 1049843 counting only the distinct ones).

The product of its digits is 3499200, while the sum is 51.

The square root of 856653936 is about 29268.6510792691. The cubic root of 856653936 is about 949.7336043450.

The spelling of 856653936 in words is "eight hundred fifty-six million, six hundred fifty-three thousand, nine hundred thirty-six".