3216939 has 16 divisors (see below), whose sum is σ = 4748544. Its totient is φ = 1920800.

The previous prime is 3216937. The next prime is 3216949. The reversal of 3216939 is 9396123.

It is a cyclic number.

It is not a de Polignac number, because 3216939 - 2¹ = 3216937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

Its product of digits (8748) is a multiple of the sum of its prime divisors (1458).

3216939 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3216931) 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, 1657 + ... + 3029.

It is an arithmetic number, because the mean of its divisors is an integer number (296784).

Almost surely, 2^3216939 is an apocalyptic number.

3216939 is a deficient number, since it is larger than the sum of its proper divisors (1531605).

3216939 is a wasteful number, since it uses less digits than its factorization.

3216939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1458.

The product of its digits is 8748, while the sum is 33.

The square root of 3216939 is about 1793.5827273923. The cubic root of 3216939 is about 147.6208183706.

It can be divided in two parts, 321 and 6939, that added together give a triangular number (7260 = T₁₂₀).

The spelling of 3216939 in words is "three million, two hundred sixteen thousand, nine hundred thirty-nine".