44640247 has 4 divisors (see below), whose sum is σ = 44731656. Its totient is φ = 44548840.

The previous prime is 44640229. The next prime is 44640259. The reversal of 44640247 is 74204644.

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 44640247 - 2¹¹ = 44638199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44640047) 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, 44968 + ... + 45949.

It is an arithmetic number, because the mean of its divisors is an integer number (11182914).

Almost surely, 2^44640247 is an apocalyptic number.

44640247 is a deficient number, since it is larger than the sum of its proper divisors (91409).

44640247 is an equidigital number, since it uses as much as digits as its factorization.

44640247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91408.

The product of its (nonzero) digits is 21504, while the sum is 31.

The square root of 44640247 is about 6681.3357197495. The cubic root of 44640247 is about 354.7389391923.

The spelling of 44640247 in words is "forty-four million, six hundred forty thousand, two hundred forty-seven".