4028266021 has 8 divisors (see below), whose sum is σ = 4377933560. Its totient is φ = 3684284352.

The previous prime is 4028266003. The next prime is 4028266027. The reversal of 4028266021 is 1206628204.

It can be written as a sum of positive squares in 4 ways, for example, as 1367150625 + 2661115396 = 36975^2 + 51586^2 .

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 4028266021 - 2²³ = 4019877413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4028266027) 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, 1419990 + ... + 1422823.

It is an arithmetic number, because the mean of its divisors is an integer number (547241695).

Almost surely, 2^4028266021 is an apocalyptic number.

It is an amenable number.

4028266021 is a deficient number, since it is larger than the sum of its proper divisors (349667539).

4028266021 is a wasteful number, since it uses less digits than its factorization.

4028266021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2842935.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 4028266021 is about 63468.6223341897. The cubic root of 4028266021 is about 1591.1314048212.

The spelling of 4028266021 in words is "four billion, twenty-eight million, two hundred sixty-six thousand, twenty-one".