3440728646 has 8 divisors (see below), whose sum is σ = 5223275064. Its totient is φ = 1699636960.

The previous prime is 3440728597. The next prime is 3440728661. The reversal of 3440728646 is 6468270443.

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

It is a super-2 number, since 2×3440728646² = 23677227230809986632, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3440728597 and 3440728606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10363475 + ... + 10363806.

It is an arithmetic number, because the mean of its divisors is an integer number (652909383).

Almost surely, 2^3440728646 is an apocalyptic number.

3440728646 is a deficient number, since it is larger than the sum of its proper divisors (1782546418).

3440728646 is a wasteful number, since it uses less digits than its factorization.

3440728646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20727366.

The product of its (nonzero) digits is 774144, while the sum is 44.

The square root of 3440728646 is about 58657.7245211575. The cubic root of 3440728646 is about 1509.6750387654.

The spelling of 3440728646 in words is "three billion, four hundred forty million, seven hundred twenty-eight thousand, six hundred forty-six".