3549428856 has 64 divisors (see below), whose sum is σ = 9867110400. Its totient is φ = 1182232800.

The previous prime is 3549428843. The next prime is 3549428863. The reversal of 3549428856 is 6588249453.

3549428856 is a `hidden beast` number, since 3 + 549 + 42 + 8 + 8 + 56 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 312151 + ... + 323321.

It is an arithmetic number, because the mean of its divisors is an integer number (154173600).

Almost surely, 2^3549428856 is an apocalyptic number.

3549428856 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3549428856 is an abundant number, since it is smaller than the sum of its proper divisors (6317681544).

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

3549428856 is a wasteful number, since it uses less digits than its factorization.

3549428856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12657 (or 12647 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 54.

The square root of 3549428856 is about 59577.0833122938. The cubic root of 3549428856 is about 1525.4084876879.

The spelling of 3549428856 in words is "three billion, five hundred forty-nine million, four hundred twenty-eight thousand, eight hundred fifty-six".