3997288 has 8 divisors (see below), whose sum is σ = 7494930. Its totient is φ = 1998640.

The previous prime is 3997271. The next prime is 3997297. The reversal of 3997288 is 8827993.

It can be written as a sum of positive squares in only one way, i.e., 2196324 + 1800964 = 1482^2 + 1342^2 .

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

It is a super-2 number, since 2×3997288² = 31956622709888, which contains 22 as substring.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249823 + ... + 249838.

Almost surely, 2^3997288 is an apocalyptic number.

It is an amenable number.

3997288 is a deficient number, since it is larger than the sum of its proper divisors (3497642).

3997288 is a wasteful number, since it uses less digits than its factorization.

3997288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499667 (or 499663 counting only the distinct ones).

The product of its digits is 217728, while the sum is 46.

The square root of 3997288 is about 1999.3218850400. The cubic root of 3997288 is about 158.7042218222.

The spelling of 3997288 in words is "three million, nine hundred ninety-seven thousand, two hundred eighty-eight".