3888521 has 24 divisors (see below), whose sum is σ = 5094720. Its totient is φ = 2897856.

The previous prime is 3888517. The next prime is 3888527. The reversal of 3888521 is 1258883.

It is not a de Polignac number, because 3888521 - 2² = 3888517 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3888527) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22391 + ... + 22563.

It is an arithmetic number, because the mean of its divisors is an integer number (212280).

Almost surely, 2^3888521 is an apocalyptic number.

It is an amenable number.

3888521 is a deficient number, since it is larger than the sum of its proper divisors (1206199).

3888521 is a wasteful number, since it uses less digits than its factorization.

3888521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225 (or 212 counting only the distinct ones).

The product of its digits is 15360, while the sum is 35.

The square root of 3888521 is about 1971.9333153025. The cubic root of 3888521 is about 157.2515070336.

The spelling of 3888521 in words is "three million, eight hundred eighty-eight thousand, five hundred twenty-one".