28279463 has 6 divisors (see below), whose sum is σ = 28987752. Its totient is φ = 27588080.

The previous prime is 28279457. The next prime is 28279469. The reversal of 28279463 is 36497282.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28279457) and next prime (28279469).

It is not a de Polignac number, because 28279463 - 2⁶ = 28279399 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28279463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28279469) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6731 + ... + 10092.

It is an arithmetic number, because the mean of its divisors is an integer number (4831292).

Almost surely, 2^28279463 is an apocalyptic number.

28279463 is a deficient number, since it is larger than the sum of its proper divisors (708289).

28279463 is an equidigital number, since it uses as much as digits as its factorization.

28279463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16905 (or 16864 counting only the distinct ones).

The product of its digits is 145152, while the sum is 41.

The square root of 28279463 is about 5317.8438299747. The cubic root of 28279463 is about 304.6658097187.

The spelling of 28279463 in words is "twenty-eight million, two hundred seventy-nine thousand, four hundred sixty-three".