2028772651 has 4 divisors (see below), whose sum is σ = 2028883032. Its totient is φ = 2028662272.

The previous prime is 2028772631. The next prime is 2028772679. The reversal of 2028772651 is 1562778202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2028772651 - 2¹⁹ = 2028248363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2028772621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20245 + ... + 66838.

It is an arithmetic number, because the mean of its divisors is an integer number (507220758).

Almost surely, 2^2028772651 is an apocalyptic number.

2028772651 is a deficient number, since it is larger than the sum of its proper divisors (110381).

2028772651 is an equidigital number, since it uses as much as digits as its factorization.

2028772651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110380.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 2028772651 is about 45041.8988387479. The cubic root of 2028772651 is about 1265.9341838991.

The spelling of 2028772651 in words is "two billion, twenty-eight million, seven hundred seventy-two thousand, six hundred fifty-one".