28748351 has 4 divisors (see below), whose sum is σ = 28762152. Its totient is φ = 28734552.

The previous prime is 28748347. The next prime is 28748353. The reversal of 28748351 is 15384782.

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 28748351 - 2² = 28748347 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 (28748353) 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, 3065 + ... + 8178.

It is an arithmetic number, because the mean of its divisors is an integer number (7190538).

Almost surely, 2^28748351 is an apocalyptic number.

28748351 is a deficient number, since it is larger than the sum of its proper divisors (13801).

28748351 is a wasteful number, since it uses less digits than its factorization.

28748351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13800.

The product of its digits is 53760, while the sum is 38.

The square root of 28748351 is about 5361.7488751339. The cubic root of 28748351 is about 306.3404266637.

The spelling of 28748351 in words is "twenty-eight million, seven hundred forty-eight thousand, three hundred fifty-one".