3221738 has 32 divisors (see below), whose sum is σ = 5688144. Its totient is φ = 1354752.

The previous prime is 3221731. The next prime is 3221747. The reversal of 3221738 is 8371223.

It can be written as a sum of positive squares in 8 ways, for example, as 2968729 + 253009 = 1723^2 + 503^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (3221731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16256 + ... + 16452.

Almost surely, 2^3221738 is an apocalyptic number.

3221738 is a deficient number, since it is larger than the sum of its proper divisors (2466406).

3221738 is a wasteful number, since it uses less digits than its factorization.

3221738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266.

The product of its digits is 2016, while the sum is 26.

The square root of 3221738 is about 1794.9200539300. The cubic root of 3221738 is about 147.6941883580.

The spelling of 3221738 in words is "three million, two hundred twenty-one thousand, seven hundred thirty-eight".