28775426 has 4 divisors (see below), whose sum is σ = 43163142. Its totient is φ = 14387712.

The previous prime is 28775413. The next prime is 28775429. The reversal of 28775426 is 62457782.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 24157225 + 4618201 = 4915^2 + 2149^2 .

It is not an unprimeable number, because it can be changed into a prime (28775429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7193855 + ... + 7193858.

Almost surely, 2^28775426 is an apocalyptic number.

28775426 is a deficient number, since it is larger than the sum of its proper divisors (14387716).

28775426 is a wasteful number, since it uses less digits than its factorization.

28775426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14387715.

The product of its digits is 188160, while the sum is 41.

The square root of 28775426 is about 5364.2731101241. The cubic root of 28775426 is about 306.4365662604.

The spelling of 28775426 in words is "twenty-eight million, seven hundred seventy-five thousand, four hundred twenty-six".