2081996280 has 384 divisors, whose sum is σ = 8504496000. Its totient is φ = 438939648.

The previous prime is 2081996251. The next prime is 2081996299. The reversal of 2081996280 is 826991802.

2081996280 is a `hidden beast` number, since 2 + 0 + 8 + 19 + 9 + 628 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1604592 + ... + 1605888.

It is an arithmetic number, because the mean of its divisors is an integer number (22147125).

Almost surely, 2^2081996280 is an apocalyptic number.

2081996280 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 2081996280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4252248000).

2081996280 is an abundant number, since it is smaller than the sum of its proper divisors (6422499720).

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

2081996280 is a wasteful number, since it uses less digits than its factorization.

2081996280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348 (or 1327 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 2081996280 is about 45628.8974225764. The cubic root of 2081996280 is about 1276.9091030960.

The spelling of 2081996280 in words is "two billion, eighty-one million, nine hundred ninety-six thousand, two hundred eighty".