3318728 has 16 divisors (see below), whose sum is σ = 7111680. Its totient is φ = 1422288.

The previous prime is 3318719. The next prime is 3318769. The reversal of 3318728 is 8278133.

It is a super-2 number, since 2×3318728² = 22027911075968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3318694 and 3318703.

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, 29576 + ... + 29687.

It is an arithmetic number, because the mean of its divisors is an integer number (444480).

Almost surely, 2^3318728 is an apocalyptic number.

It is an amenable number.

3318728 is an abundant number, since it is smaller than the sum of its proper divisors (3792952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3318728 is a wasteful number, since it uses less digits than its factorization.

3318728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59276 (or 59272 counting only the distinct ones).

The product of its digits is 8064, while the sum is 32.

The square root of 3318728 is about 1821.7376320426. The cubic root of 3318728 is about 149.1616640888.

The spelling of 3318728 in words is "three million, three hundred eighteen thousand, seven hundred twenty-eight".