28454422637 has 4 divisors (see below), whose sum is σ = 29116153440. Its totient is φ = 27792691836.

The previous prime is 28454422559. The next prime is 28454422649. The reversal of 28454422637 is 73622445482.

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 28454422637 - 2¹² = 28454418541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28454422591 and 28454422600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28454122637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 330865337 + ... + 330865422.

It is an arithmetic number, because the mean of its divisors is an integer number (7279038360).

Almost surely, 2^28454422637 is an apocalyptic number.

It is an amenable number.

28454422637 is a deficient number, since it is larger than the sum of its proper divisors (661730803).

28454422637 is an equidigital number, since it uses as much as digits as its factorization.

28454422637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661730802.

The product of its digits is 2580480, while the sum is 47.

The spelling of 28454422637 in words is "twenty-eight billion, four hundred fifty-four million, four hundred twenty-two thousand, six hundred thirty-seven".