28457266 has 4 divisors (see below), whose sum is σ = 42685902. Its totient is φ = 14228632.

The previous prime is 28457263. The next prime is 28457267. The reversal of 28457266 is 66275482.

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., 23726641 + 4730625 = 4871^2 + 2175^2 .

It is a super-3 number, since 3×28457266³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (28457263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7114315 + ... + 7114318.

Almost surely, 2^28457266 is an apocalyptic number.

28457266 is a deficient number, since it is larger than the sum of its proper divisors (14228636).

28457266 is a wasteful number, since it uses less digits than its factorization.

28457266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14228635.

The product of its digits is 161280, while the sum is 40.

The square root of 28457266 is about 5334.5352187421. The cubic root of 28457266 is about 305.3029901368.

The spelling of 28457266 in words is "twenty-eight million, four hundred fifty-seven thousand, two hundred sixty-six".