3887428 has 6 divisors (see below), whose sum is σ = 6803006. Its totient is φ = 1943712.

The previous prime is 3887399. The next prime is 3887449. The reversal of 3887428 is 8247883.

It can be written as a sum of positive squares in only one way, i.e., 2930944 + 956484 = 1712^2 + 978^2 .

It is a super-2 number, since 2×3887428² = 30224192910368, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485925 + ... + 485932.

Almost surely, 2^3887428 is an apocalyptic number.

It is an amenable number.

3887428 is a deficient number, since it is larger than the sum of its proper divisors (2915578).

3887428 is a wasteful number, since it uses less digits than its factorization.

3887428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971861 (or 971859 counting only the distinct ones).

The product of its digits is 86016, while the sum is 40.

The square root of 3887428 is about 1971.6561566358. The cubic root of 3887428 is about 157.2367720394.

The spelling of 3887428 in words is "three million, eight hundred eighty-seven thousand, four hundred twenty-eight".