3997830 has 16 divisors (see below), whose sum is σ = 9594864. Its totient is φ = 1066080.

The previous prime is 3997811. The next prime is 3997849. The reversal of 3997830 is 387993.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3997811) and next prime (3997849).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66601 + ... + 66660.

It is an arithmetic number, because the mean of its divisors is an integer number (599679).

Almost surely, 2^3997830 is an apocalyptic number.

3997830 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3997830 is an abundant number, since it is smaller than the sum of its proper divisors (5597034).

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

3997830 is a wasteful number, since it uses less digits than its factorization.

3997830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133271.

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 3997830 is about 1999.4574264035. The cubic root of 3997830 is about 158.7113945020.

The spelling of 3997830 in words is "three million, nine hundred ninety-seven thousand, eight hundred thirty".