44991457 has 6 divisors (see below), whose sum is σ = 52337058. Its totient is φ = 38564064.

The previous prime is 44991421. The next prime is 44991491. The reversal of 44991457 is 75419944.

44991457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 23126481 + 21864976 = 4809^2 + 4676^2 .

It is a de Polignac number, because none of the positive numbers 2^k-44991457 is a prime.

It is a super-3 number, since 3×44991457³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44991407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 459048 + ... + 459145.

It is an arithmetic number, because the mean of its divisors is an integer number (8722843).

Almost surely, 2^44991457 is an apocalyptic number.

It is an amenable number.

44991457 is a deficient number, since it is larger than the sum of its proper divisors (7345601).

44991457 is an equidigital number, since it uses as much as digits as its factorization.

44991457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918207 (or 918200 counting only the distinct ones).

The product of its digits is 181440, while the sum is 43.

The square root of 44991457 is about 6707.5671446509. The cubic root of 44991457 is about 355.6668204767. Note that the first 3 decimals are identical.

The spelling of 44991457 in words is "forty-four million, nine hundred ninety-one thousand, four hundred fifty-seven".