3928642 has 8 divisors (see below), whose sum is σ = 5907132. Its totient is φ = 1959600.

The previous prime is 3928637. The next prime is 3928651. The reversal of 3928642 is 2468293.

It can be written as a sum of positive squares in 2 ways, for example, as 3759721 + 168921 = 1939^2 + 411^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 3928598 and 3928607.

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, 1209 + ... + 3052.

Almost surely, 2^3928642 is an apocalyptic number.

3928642 is a deficient number, since it is larger than the sum of its proper divisors (1978490).

3928642 is a wasteful number, since it uses less digits than its factorization.

3928642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4724.

The product of its digits is 20736, while the sum is 34.

The square root of 3928642 is about 1982.0802203745. The cubic root of 3928642 is about 157.7904876725.

The spelling of 3928642 in words is "three million, nine hundred twenty-eight thousand, six hundred forty-two".