3897478828 has 24 divisors (see below), whose sum is σ = 6927669504. Its totient is φ = 1918232400.

The previous prime is 3897478801. The next prime is 3897478829. The reversal of 3897478828 is 8288747983.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 3897478828.

It is not an unprimeable number, because it can be changed into a prime (3897478829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173143 + ... + 194353.

It is an arithmetic number, because the mean of its divisors is an integer number (288652896).

Almost surely, 2^3897478828 is an apocalyptic number.

It is an amenable number.

3897478828 is a deficient number, since it is larger than the sum of its proper divisors (3030190676).

3897478828 is a wasteful number, since it uses less digits than its factorization.

3897478828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21933 (or 21931 counting only the distinct ones).

The product of its digits is 43352064, while the sum is 64.

The square root of 3897478828 is about 62429.7911897837. The cubic root of 3897478828 is about 1573.7216573354.

The spelling of 3897478828 in words is "three billion, eight hundred ninety-seven million, four hundred seventy-eight thousand, eight hundred twenty-eight".