44140257 has 12 divisors (see below), whose sum is σ = 72866560. Its totient is φ = 25222968.

The previous prime is 44140183. The next prime is 44140267. The reversal of 44140257 is 75204144.

It is not a de Polignac number, because 44140257 - 2¹⁰ = 44139233 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 44140257.

It is not an unprimeable number, because it can be changed into a prime (44140267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 350257 + ... + 350382.

Almost surely, 2^44140257 is an apocalyptic number.

It is an amenable number.

44140257 is a deficient number, since it is larger than the sum of its proper divisors (28726303).

44140257 is a wasteful number, since it uses less digits than its factorization.

44140257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700652 (or 700649 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 44140257 is about 6643.8134380791. The cubic root of 44140257 is about 353.4095538861.

The spelling of 44140257 in words is "forty-four million, one hundred forty thousand, two hundred fifty-seven".