28460291 has 4 divisors (see below), whose sum is σ = 28850232. Its totient is φ = 28070352.

The previous prime is 28460249. The next prime is 28460317. The reversal of 28460291 is 19206482.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19206482 = 2 ⋅9603241.

It is a cyclic number.

It is not a de Polignac number, because 28460291 - 2¹⁰ = 28459267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28460231) 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, 194861 + ... + 195006.

It is an arithmetic number, because the mean of its divisors is an integer number (7212558).

Almost surely, 2^28460291 is an apocalyptic number.

28460291 is a deficient number, since it is larger than the sum of its proper divisors (389941).

28460291 is an equidigital number, since it uses as much as digits as its factorization.

28460291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389940.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 28460291 is about 5334.8187410633. The cubic root of 28460291 is about 305.3138076297.

The spelling of 28460291 in words is "twenty-eight million, four hundred sixty thousand, two hundred ninety-one".