2797138818 has 80 divisors (see below), whose sum is σ = 6444118296. Its totient is φ = 906301440.

The previous prime is 2797138811. The next prime is 2797138819. The reversal of 2797138818 is 8188317972.

It is a happy number.

2797138818 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1594644489 + 1202494329 = 39933^2 + 34677^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (2797138811) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2344030 + ... + 2345222.

Almost surely, 2^2797138818 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2797138818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3222059148).

2797138818 is an abundant number, since it is smaller than the sum of its proper divisors (3646979478).

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

2797138818 is a wasteful number, since it uses less digits than its factorization.

2797138818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601 (or 1592 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 54.

The square root of 2797138818 is about 52887.9836824963. The cubic root of 2797138818 is about 1408.9794969785.

The spelling of 2797138818 in words is "two billion, seven hundred ninety-seven million, one hundred thirty-eight thousand, eight hundred eighteen".