2788132021 has 8 divisors (see below), whose sum is σ = 2805802200. Its totient is φ = 2770510080.

The previous prime is 2788131943. The next prime is 2788132027. The reversal of 2788132021 is 1202318872.

2788132021 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 279224100 + 2508907921 = 16710^2 + 50089^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2788132021 - 2⁷ = 2788131893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2788132027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107625 + ... + 130993.

It is an arithmetic number, because the mean of its divisors is an integer number (350725275).

Almost surely, 2^2788132021 is an apocalyptic number.

It is an amenable number.

2788132021 is a deficient number, since it is larger than the sum of its proper divisors (17670179).

2788132021 is a wasteful number, since it uses less digits than its factorization.

2788132021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24119.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 2788132021 is about 52802.7652779663. The cubic root of 2788132021 is about 1407.4655645177.

The spelling of 2788132021 in words is "two billion, seven hundred eighty-eight million, one hundred thirty-two thousand, twenty-one".