28750226 has 4 divisors (see below), whose sum is σ = 43125342. Its totient is φ = 14375112.

The previous prime is 28750217. The next prime is 28750259. The reversal of 28750226 is 62205782.

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., 27573001 + 1177225 = 5251^2 + 1085^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28750192 and 28750201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7187555 + ... + 7187558.

Almost surely, 2^28750226 is an apocalyptic number.

28750226 is a deficient number, since it is larger than the sum of its proper divisors (14375116).

28750226 is a wasteful number, since it uses less digits than its factorization.

28750226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14375115.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 28750226 is about 5361.9237219491. The cubic root of 28750226 is about 306.3470864754.

The spelling of 28750226 in words is "twenty-eight million, seven hundred fifty thousand, two hundred twenty-six".