4028891093 has 4 divisors (see below), whose sum is σ = 4029037440. Its totient is φ = 4028744748.

The previous prime is 4028891077. The next prime is 4028891107. The reversal of 4028891093 is 3901988204.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4028891093 - 2⁴ = 4028891077 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 (4028891003) 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, 18023 + ... + 91556.

It is an arithmetic number, because the mean of its divisors is an integer number (1007259360).

Almost surely, 2^4028891093 is an apocalyptic number.

It is an amenable number.

4028891093 is a deficient number, since it is larger than the sum of its proper divisors (146347).

4028891093 is a wasteful number, since it uses less digits than its factorization.

4028891093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146346.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 4028891093 is about 63473.5464032064. The cubic root of 4028891093 is about 1591.2136999696.

The spelling of 4028891093 in words is "four billion, twenty-eight million, eight hundred ninety-one thousand, ninety-three".