3997898280 has 96 divisors (see below), whose sum is σ = 13011134760. Its totient is φ = 1064632320.

The previous prime is 3997898257. The next prime is 3997898299. The reversal of 3997898280 is 828987993.

It can be written as a sum of positive squares in 4 ways, for example, as 899640036 + 3098258244 = 29994^2 + 55662^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 266664 + ... + 281256.

Almost surely, 2^3997898280 is an apocalyptic number.

3997898280 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3997898280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6505567380).

3997898280 is an abundant number, since it is smaller than the sum of its proper divisors (9013236480).

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

3997898280 is a wasteful number, since it uses less digits than its factorization.

3997898280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15371 (or 15364 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 63.

The square root of 3997898280 is about 63228.9354647063. The cubic root of 3997898280 is about 1587.1229805486.

The spelling of 3997898280 in words is "three billion, nine hundred ninety-seven million, eight hundred ninety-eight thousand, two hundred eighty".