441608991 has 16 divisors (see below), whose sum is σ = 607799808. Its totient is φ = 285022400.

The previous prime is 441608987. The next prime is 441609019. The reversal of 441608991 is 199806144.

It is a cyclic number.

It is not a de Polignac number, because 441608991 - 2² = 441608987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (441608911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2410 + ... + 29816.

It is an arithmetic number, because the mean of its divisors is an integer number (37987488).

Almost surely, 2^441608991 is an apocalyptic number.

441608991 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

441608991 is a deficient number, since it is larger than the sum of its proper divisors (166190817).

441608991 is a wasteful number, since it uses less digits than its factorization.

441608991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27582.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 441608991 is about 21014.4947833632. The cubic root of 441608991 is about 761.5164728874.

The spelling of 441608991 in words is "four hundred forty-one million, six hundred eight thousand, nine hundred ninety-one".