3909428 has 6 divisors (see below), whose sum is σ = 6841506. Its totient is φ = 1954712.

The previous prime is 3909427. The next prime is 3909463. The reversal of 3909428 is 8249093.

It can be written as a sum of positive squares in only one way, i.e., 2521744 + 1387684 = 1588^2 + 1178^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3909427) by changing a digit.

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 as a sum of consecutive naturals, namely, 488675 + ... + 488682.

It is an arithmetic number, because the mean of its divisors is an integer number (1140251).

Almost surely, 2^3909428 is an apocalyptic number.

It is an amenable number.

3909428 is a deficient number, since it is larger than the sum of its proper divisors (2932078).

3909428 is a wasteful number, since it uses less digits than its factorization.

3909428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977361 (or 977359 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 3909428 is about 1977.2273516215. The cubic root of 3909428 is about 157.5328293034.

The spelling of 3909428 in words is "three million, nine hundred nine thousand, four hundred twenty-eight".