3806728 has 8 divisors (see below), whose sum is σ = 7137630. Its totient is φ = 1903360.

The previous prime is 3806711. The next prime is 3806741. The reversal of 3806728 is 8276083.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2762244 + 1044484 = 1662^2 + 1022^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 3806693 and 3806702.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 237913 + ... + 237928.

Almost surely, 2^3806728 is an apocalyptic number.

It is an amenable number.

3806728 is a deficient number, since it is larger than the sum of its proper divisors (3330902).

3806728 is a wasteful number, since it uses less digits than its factorization.

3806728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475847 (or 475843 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 3806728 is about 1951.0838013781. The cubic root of 3806728 is about 156.1411171025.

The spelling of 3806728 in words is "three million, eight hundred six thousand, seven hundred twenty-eight".