2081612280 has 128 divisors (see below), whose sum is σ = 6914522880. Its totient is φ = 497080320.

The previous prime is 2081612191. The next prime is 2081612287. The reversal of 2081612280 is 822161802.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2081612287) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76672 + ... + 100208.

It is an arithmetic number, because the mean of its divisors is an integer number (54019710).

Almost surely, 2^2081612280 is an apocalyptic number.

2081612280 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 2081612280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3457261440).

2081612280 is an abundant number, since it is smaller than the sum of its proper divisors (4832910600).

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

2081612280 is a wasteful number, since it uses less digits than its factorization.

2081612280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23629 (or 23625 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 2081612280 is about 45624.6893688056. The cubic root of 2081612280 is about 1276.8305945914.

The spelling of 2081612280 in words is "two billion, eighty-one million, six hundred twelve thousand, two hundred eighty".