28051274 has 4 divisors (see below), whose sum is σ = 42076914. Its totient is φ = 14025636.

The previous prime is 28051273. The next prime is 28051279. The reversal of 28051274 is 47215082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47215082 = 2 ⋅23607541.

It can be written as a sum of positive squares in only one way, i.e., 22024249 + 6027025 = 4693^2 + 2455^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28051273) 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 as a sum of consecutive naturals, namely, 7012817 + ... + 7012820.

Almost surely, 2^28051274 is an apocalyptic number.

28051274 is a deficient number, since it is larger than the sum of its proper divisors (14025640).

28051274 is a wasteful number, since it uses less digits than its factorization.

28051274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14025639.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 28051274 is about 5296.3453437252. The cubic root of 28051274 is about 303.8441389979.

The spelling of 28051274 in words is "twenty-eight million, fifty-one thousand, two hundred seventy-four".