28754207 has 4 divisors (see below), whose sum is σ = 28777296. Its totient is φ = 28731120.

The previous prime is 28754153. The next prime is 28754213. The reversal of 28754207 is 70245782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70245782 = 2 ⋅35122891.

It is a cyclic number.

It is not a de Polignac number, because 28754207 - 2²² = 24559903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28754237) 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, 9563 + ... + 12204.

It is an arithmetic number, because the mean of its divisors is an integer number (7194324).

Almost surely, 2^28754207 is an apocalyptic number.

28754207 is a deficient number, since it is larger than the sum of its proper divisors (23089).

28754207 is a wasteful number, since it uses less digits than its factorization.

28754207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23088.

The product of its (nonzero) digits is 31360, while the sum is 35.

The square root of 28754207 is about 5362.2949378041. The cubic root of 28754207 is about 306.3612256276.

Adding to 28754207 its reverse (70245782), we get a palindrome (98999989).

The spelling of 28754207 in words is "twenty-eight million, seven hundred fifty-four thousand, two hundred seven".