44628509 has 2 divisors, whose sum is σ = 44628510. Its totient is φ = 44628508.

The previous prime is 44628497. The next prime is 44628527. The reversal of 44628509 is 90582644.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44023225 + 605284 = 6635^2 + 778^2 .

It is a cyclic number.

It is not a de Polignac number, because 44628509 - 2¹² = 44624413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44628569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22314254 + 22314255.

It is an arithmetic number, because the mean of its divisors is an integer number (22314255).

Almost surely, 2^44628509 is an apocalyptic number.

It is an amenable number.

44628509 is a deficient number, since it is larger than the sum of its proper divisors (1).

44628509 is an equidigital number, since it uses as much as digits as its factorization.

44628509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 44628509 is about 6680.4572448299. The cubic root of 44628509 is about 354.7078440038.

The spelling of 44628509 in words is "forty-four million, six hundred twenty-eight thousand, five hundred nine".