28440461449 has 3 divisors (see below), whose sum is σ = 28440630093. Its totient is φ = 28440292806.

The previous prime is 28440461437. The next prime is 28440461479. The reversal of 28440461449 is 94416404482.

The square root of 28440461449 is 168643.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 28440461449 - 2⁵ = 28440461417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28440461399 and 28440461408.

It is not an unprimeable number, because it can be changed into a prime (28440461479) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 84322 + ... + 252964.

It is an arithmetic number, because the mean of its divisors is an integer number (9480210031).

Almost surely, 2^28440461449 is an apocalyptic number.

28440461449 is the 168643-rd square number.

28440461449 is the 84322-nd centered octagonal number.

It is an amenable number.

28440461449 is a deficient number, since it is larger than the sum of its proper divisors (168644).

28440461449 is an frugal number, since it uses more digits than its factorization.

28440461449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337286 (or 168643 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 46.

The spelling of 28440461449 in words is "twenty-eight billion, four hundred forty million, four hundred sixty-one thousand, four hundred forty-nine".