448507391 has 4 divisors (see below), whose sum is σ = 451193232. Its totient is φ = 445821552.

The previous prime is 448507363. The next prime is 448507399. The reversal of 448507391 is 193705844.

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 448507391 - 2¹⁸ = 448245247 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 (448507399) 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, 1342670 + ... + 1343003.

It is an arithmetic number, because the mean of its divisors is an integer number (112798308).

Almost surely, 2^448507391 is an apocalyptic number.

448507391 is a deficient number, since it is larger than the sum of its proper divisors (2685841).

448507391 is a wasteful number, since it uses less digits than its factorization.

448507391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2685840.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 448507391 is about 21177.9930824429. The cubic root of 448507391 is about 765.4612343800.

The spelling of 448507391 in words is "four hundred forty-eight million, five hundred seven thousand, three hundred ninety-one".