28278496 has 12 divisors (see below), whose sum is σ = 55673352. Its totient is φ = 14139232.

The previous prime is 28278493. The next prime is 28278499. The reversal of 28278496 is 69487282.

It is an interprime number because it is at equal distance from previous prime (28278493) and next prime (28278499).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28278493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 441820 + ... + 441883.

It is an arithmetic number, because the mean of its divisors is an integer number (4639446).

Almost surely, 2^28278496 is an apocalyptic number.

It is an amenable number.

28278496 is a deficient number, since it is larger than the sum of its proper divisors (27394856).

28278496 is an equidigital number, since it uses as much as digits as its factorization.

28278496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883713 (or 883705 counting only the distinct ones).

The product of its digits is 387072, while the sum is 46.

The square root of 28278496 is about 5317.7529088892. The cubic root of 28278496 is about 304.6623370550.

The spelling of 28278496 in words is "twenty-eight million, two hundred seventy-eight thousand, four hundred ninety-six".