3900128 has 24 divisors (see below), whose sum is σ = 7722792. Its totient is φ = 1938816.

The previous prime is 3900121. The next prime is 3900131. The reversal of 3900128 is 8210093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3900121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9626 + ... + 10022.

It is an arithmetic number, because the mean of its divisors is an integer number (321783).

Almost surely, 2^3900128 is an apocalyptic number.

It is an amenable number.

3900128 is a deficient number, since it is larger than the sum of its proper divisors (3822664).

3900128 is a wasteful number, since it uses less digits than its factorization.

3900128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714 (or 706 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 3900128 is about 1974.8741732070. The cubic root of 3900128 is about 157.4078136939.

The spelling of 3900128 in words is "three million, nine hundred thousand, one hundred twenty-eight".