44136891 has 6 divisors (see below), whose sum is σ = 63753300. Its totient is φ = 29424588.

The previous prime is 44136887. The next prime is 44136907. The reversal of 44136891 is 19863144.

It is not a de Polignac number, because 44136891 - 2² = 44136887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (44136821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2452041 + ... + 2452058.

It is an arithmetic number, because the mean of its divisors is an integer number (10625550).

Almost surely, 2^44136891 is an apocalyptic number.

44136891 is a deficient number, since it is larger than the sum of its proper divisors (19616409).

44136891 is a wasteful number, since it uses less digits than its factorization.

44136891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4904105 (or 4904102 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 44136891 is about 6643.5601148782. The cubic root of 44136891 is about 353.4005703499.

The spelling of 44136891 in words is "forty-four million, one hundred thirty-six thousand, eight hundred ninety-one".