28406456 has 32 divisors (see below), whose sum is σ = 60737040. Its totient is φ = 12338688.

The previous prime is 28406453. The next prime is 28406503. The reversal of 28406456 is 65460482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28406453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6266 + ... + 9801.

Almost surely, 2^28406456 is an apocalyptic number.

28406456 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

28406456 is an abundant number, since it is smaller than the sum of its proper divisors (32330584).

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

28406456 is a wasteful number, since it uses less digits than its factorization.

28406456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16103 (or 16099 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 35.

The square root of 28406456 is about 5329.7707267762. The cubic root of 28406456 is about 305.1211773266.

The spelling of 28406456 in words is "twenty-eight million, four hundred six thousand, four hundred fifty-six".