3389721 has 8 divisors (see below), whose sum is σ = 4605120. Its totient is φ = 2217072.

The previous prime is 3389719. The next prime is 3389747. The reversal of 3389721 is 1279833.

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

It is not a de Polignac number, because 3389721 - 2¹ = 3389719 is a prime.

It is a super-2 number, since 2×3389721² = 22980416915682, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3389521) 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, 10501 + ... + 10818.

It is an arithmetic number, because the mean of its divisors is an integer number (575640).

Almost surely, 2^3389721 is an apocalyptic number.

It is an amenable number.

3389721 is a deficient number, since it is larger than the sum of its proper divisors (1215399).

3389721 is a wasteful number, since it uses less digits than its factorization.

3389721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21375.

The product of its digits is 9072, while the sum is 33.

The square root of 3389721 is about 1841.1194963934. The cubic root of 3389721 is about 150.2177725699.

The spelling of 3389721 in words is "three million, three hundred eighty-nine thousand, seven hundred twenty-one".