4401891887 has 4 divisors (see below), whose sum is σ = 4520861976. Its totient is φ = 4282921800.

The previous prime is 4401891881. The next prime is 4401891911. The reversal of 4401891887 is 7881981044.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4401891887 - 2¹⁰ = 4401890863 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 (4401891881) 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 3 ways as a sum of consecutive naturals, for example, 59484989 + ... + 59485062.

It is an arithmetic number, because the mean of its divisors is an integer number (1130215494).

Almost surely, 2^4401891887 is an apocalyptic number.

4401891887 is a deficient number, since it is larger than the sum of its proper divisors (118970089).

4401891887 is a wasteful number, since it uses less digits than its factorization.

4401891887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118970088.

The product of its (nonzero) digits is 516096, while the sum is 50.

The square root of 4401891887 is about 66346.7549093398. The cubic root of 4401891887 is about 1638.8773656181.

The spelling of 4401891887 in words is "four billion, four hundred one million, eight hundred ninety-one thousand, eight hundred eighty-seven".