3438056721 has 32 divisors (see below), whose sum is σ = 5329317888. Its totient is φ = 1950650240.

The previous prime is 3438056711. The next prime is 3438056729. The reversal of 3438056721 is 1276508343.

It is not a de Polignac number, because 3438056721 - 2¹⁷ = 3437925649 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3438056721.

It is not an unprimeable number, because it can be changed into a prime (3438056729) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12516 + ... + 83861.

It is an arithmetic number, because the mean of its divisors is an integer number (166541184).

Almost surely, 2^3438056721 is an apocalyptic number.

It is an amenable number.

3438056721 is a deficient number, since it is larger than the sum of its proper divisors (1891261167).

3438056721 is a wasteful number, since it uses less digits than its factorization.

3438056721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96461.

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 3438056721 is about 58634.9445382188. The cubic root of 3438056721 is about 1509.2841542089.

The spelling of 3438056721 in words is "three billion, four hundred thirty-eight million, fifty-six thousand, seven hundred twenty-one".