4004251891 has 8 divisors (see below), whose sum is σ = 4112178224. Its totient is φ = 3896998560.

The previous prime is 4004251877. The next prime is 4004251939. The reversal of 4004251891 is 1981524004.

It is a happy number.

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 4004251891 - 2⁹ = 4004251379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4004251831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156180 + ... + 180001.

It is an arithmetic number, because the mean of its divisors is an integer number (514022278).

Almost surely, 2^4004251891 is an apocalyptic number.

4004251891 is a deficient number, since it is larger than the sum of its proper divisors (107926333).

4004251891 is a wasteful number, since it uses less digits than its factorization.

4004251891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336501.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 4004251891 is about 63279.1584251877. The cubic root of 4004251891 is about 1587.9633074817.

Adding to 4004251891 its reverse (1981524004), we get a palindrome (5985775895).

The spelling of 4004251891 in words is "four billion, four million, two hundred fifty-one thousand, eight hundred ninety-one".