3896728 has 16 divisors (see below), whose sum is σ = 7970760. Its totient is φ = 1771200.

The previous prime is 3896707. The next prime is 3896743. The reversal of 3896728 is 8276983.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22053 + ... + 22228.

Almost surely, 2^3896728 is an apocalyptic number.

It is an amenable number.

3896728 is an abundant number, since it is smaller than the sum of its proper divisors (4074032).

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

3896728 is a wasteful number, since it uses less digits than its factorization.

3896728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44298 (or 44294 counting only the distinct ones).

The product of its digits is 145152, while the sum is 43.

The square root of 3896728 is about 1974.0131711820. The cubic root of 3896728 is about 157.3620594553.

It can be divided in two parts, 3896 and 728, that added together give a square (4624 = 68²).

The spelling of 3896728 in words is "three million, eight hundred ninety-six thousand, seven hundred twenty-eight".