3214728 has 120 divisors (see below), whose sum is σ = 10138590. Its totient is φ = 950400.

The previous prime is 3214711. The next prime is 3214759. The reversal of 3214728 is 8274123.

It can be written as a sum of positive squares in only one way, i.e., 3175524 + 39204 = 1782^2 + 198^2 .

It is a super-2 number, since 2×3214728² = 20668952227968, which contains 22 as substring.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 78388 + ... + 78428.

Almost surely, 2^3214728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3214728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5069295).

3214728 is an abundant number, since it is smaller than the sum of its proper divisors (6923862).

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

3214728 is a wasteful number, since it uses less digits than its factorization.

3214728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81 (or 57 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 3214728 is about 1792.9662573512. The cubic root of 3214728 is about 147.5869907233.

The spelling of 3214728 in words is "three million, two hundred fourteen thousand, seven hundred twenty-eight".