3928635 has 16 divisors (see below), whose sum is σ = 6984480. Its totient is φ = 2095200.

The previous prime is 3928621. The next prime is 3928637. The reversal of 3928635 is 5368293.

It is not a de Polignac number, because 3928635 - 2⁴ = 3928619 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3928635.

It is not an unprimeable number, because it can be changed into a prime (3928637) 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, 14416 + ... + 14685.

It is an arithmetic number, because the mean of its divisors is an integer number (436530).

Almost surely, 2^3928635 is an apocalyptic number.

3928635 is a deficient number, since it is larger than the sum of its proper divisors (3055845).

3928635 is a wasteful number, since it uses less digits than its factorization.

3928635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29115 (or 29109 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 3928635 is about 1982.0784545522. The cubic root of 3928635 is about 157.7903939562.

It can be divided in two parts, 39 and 28635, that multiplied together give a triangular number (1116765 = T₁₄₉₄).

The spelling of 3928635 in words is "three million, nine hundred twenty-eight thousand, six hundred thirty-five".