2788923221 has 8 divisors (see below), whose sum is σ = 3217129920. Its totient is φ = 2368163808.

The previous prime is 2788923217. The next prime is 2788923251. The reversal of 2788923221 is 1223298872.

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 2788923221 - 2² = 2788923217 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 (2788923251) 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, 1861016 + ... + 1862513.

It is an arithmetic number, because the mean of its divisors is an integer number (402141240).

Almost surely, 2^2788923221 is an apocalyptic number.

It is an amenable number.

2788923221 is a deficient number, since it is larger than the sum of its proper divisors (428206699).

2788923221 is a wasteful number, since it uses less digits than its factorization.

2788923221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3723643.

The product of its digits is 193536, while the sum is 44.

The square root of 2788923221 is about 52810.2567783949. The cubic root of 2788923221 is about 1407.5986860757.

The spelling of 2788923221 in words is "two billion, seven hundred eighty-eight million, nine hundred twenty-three thousand, two hundred twenty-one".