28006456 has 32 divisors (see below), whose sum is σ = 57686400. Its totient is φ = 12687840.

The previous prime is 28006453. The next prime is 28006477. The reversal of 28006456 is 65460082.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28006453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 510 + ... + 7501.

It is an arithmetic number, because the mean of its divisors is an integer number (1802700).

Almost surely, 2^28006456 is an apocalyptic number.

It is an amenable number.

28006456 is an abundant number, since it is smaller than the sum of its proper divisors (29679944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28006456 is a wasteful number, since it uses less digits than its factorization.

28006456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8059 (or 8055 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 28006456 is about 5292.1126216285. The cubic root of 28006456 is about 303.6822337493.

The spelling of 28006456 in words is "twenty-eight million, six thousand, four hundred fifty-six".