28753427 has 4 divisors (see below), whose sum is σ = 30003600. Its totient is φ = 27503256.

The previous prime is 28753421. The next prime is 28753429. The reversal of 28753427 is 72435782.

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

It is a cyclic number.

It is not a de Polignac number, because 28753427 - 2⁴ = 28753411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28753421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 625052 + ... + 625097.

It is an arithmetic number, because the mean of its divisors is an integer number (7500900).

Almost surely, 2^28753427 is an apocalyptic number.

28753427 is a deficient number, since it is larger than the sum of its proper divisors (1250173).

28753427 is a wasteful number, since it uses less digits than its factorization.

28753427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250172.

The product of its digits is 94080, while the sum is 38.

The square root of 28753427 is about 5362.2222072570. Note that the first 4 decimals coincide. The cubic root of 28753427 is about 306.3584554368.

The spelling of 28753427 in words is "twenty-eight million, seven hundred fifty-three thousand, four hundred twenty-seven".