28454401 has 4 divisors (see below), whose sum is σ = 28472112. Its totient is φ = 28436692.

The previous prime is 28454389. The next prime is 28454407. The reversal of 28454401 is 10445482.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28454401 - 2¹¹ = 28452353 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 28454401.

It is not an unprimeable number, because it can be changed into a prime (28454407) 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, 6175 + ... + 9748.

It is an arithmetic number, because the mean of its divisors is an integer number (7118028).

Almost surely, 2^28454401 is an apocalyptic number.

It is an amenable number.

28454401 is a deficient number, since it is larger than the sum of its proper divisors (17711).

28454401 is a wasteful number, since it uses less digits than its factorization.

28454401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17710.

The product of its (nonzero) digits is 5120, while the sum is 28.

The square root of 28454401 is about 5334.2666787479. The cubic root of 28454401 is about 305.2927441019.

Adding to 28454401 its reverse (10445482), we get a palindrome (38899883).

The spelling of 28454401 in words is "twenty-eight million, four hundred fifty-four thousand, four hundred one".