3997530 has 24 divisors (see below), whose sum is σ = 10393812. Its totient is φ = 1065984.

The previous prime is 3997507. The next prime is 3997547. The reversal of 3997530 is 357993.

3997530 is a `hidden beast` number, since 39 + 97 + 530 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3448449 + 549081 = 1857^2 + 741^2 .

It is a super-2 number, since 2×3997530² = 31960492201800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22119 + ... + 22298.

Almost surely, 2^3997530 is an apocalyptic number.

3997530 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3997530 is an abundant number, since it is smaller than the sum of its proper divisors (6396282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3997530 is a wasteful number, since it uses less digits than its factorization.

3997530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44430 (or 44427 counting only the distinct ones).

The product of its (nonzero) digits is 25515, while the sum is 36.

The square root of 3997530 is about 1999.3824046440. The cubic root of 3997530 is about 158.7074244641.

The spelling of 3997530 in words is "three million, nine hundred ninety-seven thousand, five hundred thirty".