3997021284 has 81 divisors (see below), whose sum is σ = 10396473451. Its totient is φ = 1294786560.

The previous prime is 3997021277. The next prime is 3997021337. The reversal of 3997021284 is 4821207993.

The square root of 3997021284 is 63222.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 37088100 + 3959933184 = 6090^2 + 62928^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 15552484 + ... + 15552740.

Almost surely, 2^3997021284 is an apocalyptic number.

3997021284 is the 63222-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3997021284

3997021284 is an abundant number, since it is smaller than the sum of its proper divisors (6399452167).

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

3997021284 is a wasteful number, since it uses less digits than its factorization.

3997021284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606 (or 303 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The cubic root of 3997021284 is about 1587.0069193753.

The spelling of 3997021284 in words is "three billion, nine hundred ninety-seven million, twenty-one thousand, two hundred eighty-four".