3489394856 has 8 divisors (see below), whose sum is σ = 6542615370. Its totient is φ = 1744697424.

The previous prime is 3489394781. The next prime is 3489394861. The reversal of 3489394856 is 6584939843.

It can be written as a sum of positive squares in only one way, i.e., 2949576100 + 539818756 = 54310^2 + 23234^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×3489394856² = 24351752922158521472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3489394795 and 3489394804.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 218087171 + ... + 218087186.

Almost surely, 2^3489394856 is an apocalyptic number.

It is an amenable number.

3489394856 is a deficient number, since it is larger than the sum of its proper divisors (3053220514).

3489394856 is a wasteful number, since it uses less digits than its factorization.

3489394856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436174363 (or 436174359 counting only the distinct ones).

The product of its digits is 22394880, while the sum is 59.

The square root of 3489394856 is about 59071.1000066869. The cubic root of 3489394856 is about 1516.7594362179.

The spelling of 3489394856 in words is "three billion, four hundred eighty-nine million, three hundred ninety-four thousand, eight hundred fifty-six".