4028891107 has 2 divisors, whose sum is σ = 4028891108. Its totient is φ = 4028891106.

The previous prime is 4028891077. The next prime is 4028891129. The reversal of 4028891107 is 7011988204.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4028891107 - 2²⁷ = 3894673379 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4028891107.

It is not a weakly prime, because it can be changed into another prime (4028891137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2014445553 + 2014445554.

It is an arithmetic number, because the mean of its divisors is an integer number (2014445554).

Almost surely, 2^4028891107 is an apocalyptic number.

4028891107 is a deficient number, since it is larger than the sum of its proper divisors (1).

4028891107 is an equidigital number, since it uses as much as digits as its factorization.

4028891107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 4028891107 is about 63473.5465134886. The cubic root of 4028891107 is about 1591.2137018127.

The spelling of 4028891107 in words is "four billion, twenty-eight million, eight hundred ninety-one thousand, one hundred seven".