44072891 has 4 divisors (see below), whose sum is σ = 46665432. Its totient is φ = 41480352.

The previous prime is 44072881. The next prime is 44072933. The reversal of 44072891 is 19827044.

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 44072891 - 2¹⁸ = 43810747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44072851) 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, 1296245 + ... + 1296278.

It is an arithmetic number, because the mean of its divisors is an integer number (11666358).

Almost surely, 2^44072891 is an apocalyptic number.

44072891 is a deficient number, since it is larger than the sum of its proper divisors (2592541).

44072891 is a wasteful number, since it uses less digits than its factorization.

44072891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2592540.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 44072891 is about 6638.7416729377. The cubic root of 44072891 is about 353.2296734205.

The spelling of 44072891 in words is "forty-four million, seventy-two thousand, eight hundred ninety-one".