3899128 has 8 divisors (see below), whose sum is σ = 7310880. Its totient is φ = 1949560.

The previous prime is 3899117. The next prime is 3899131. The reversal of 3899128 is 8219983.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 243688 + ... + 243703.

It is an arithmetic number, because the mean of its divisors is an integer number (913860).

Almost surely, 2^3899128 is an apocalyptic number.

It is an amenable number.

3899128 is a deficient number, since it is larger than the sum of its proper divisors (3411752).

3899128 is a wasteful number, since it uses less digits than its factorization.

3899128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487397 (or 487393 counting only the distinct ones).

The product of its digits is 31104, while the sum is 40.

The square root of 3899128 is about 1974.6209762889. The cubic root of 3899128 is about 157.3943593261.

The spelling of 3899128 in words is "three million, eight hundred ninety-nine thousand, one hundred twenty-eight".