3997528 has 8 divisors (see below), whose sum is σ = 7495380. Its totient is φ = 1998760.

The previous prime is 3997507. The next prime is 3997547. The reversal of 3997528 is 8257993.

It is a happy number.

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

It is a super-2 number, since 2×3997528² = 31960460221568, which contains 22 as substring.

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, 249838 + ... + 249853.

Almost surely, 2^3997528 is an apocalyptic number.

It is an amenable number.

3997528 is a deficient number, since it is larger than the sum of its proper divisors (3497852).

3997528 is a wasteful number, since it uses less digits than its factorization.

3997528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499697 (or 499693 counting only the distinct ones).

The product of its digits is 136080, while the sum is 43.

The square root of 3997528 is about 1999.3819044895. The cubic root of 3997528 is about 158.7073979965.

The spelling of 3997528 in words is "three million, nine hundred ninety-seven thousand, five hundred twenty-eight".