2830991220 has 144 divisors (see below), whose sum is σ = 8709180480. Its totient is φ = 744307200.

The previous prime is 2830991201. The next prime is 2830991227. The reversal of 2830991220 is 221990382.

It is a super-2 number, since 2×2830991220² = 16029022575434176800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2830991227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4975096 + ... + 4975664.

It is an arithmetic number, because the mean of its divisors is an integer number (60480420).

Almost surely, 2^2830991220 is an apocalyptic number.

2830991220 is a gapful number since it is divisible by the number (20) 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 2830991220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4354590240).

2830991220 is an abundant number, since it is smaller than the sum of its proper divisors (5878189260).

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

2830991220 is a wasteful number, since it uses less digits than its factorization.

2830991220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926 (or 921 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 2830991220 is about 53207.0598699082. The cubic root of 2830991220 is about 1414.6407825100.

The spelling of 2830991220 in words is "two billion, eight hundred thirty million, nine hundred ninety-one thousand, two hundred twenty".