28455646 has 16 divisors (see below), whose sum is σ = 45273888. Its totient is φ = 13384800.

The previous prime is 28455643. The next prime is 28455653. The reversal of 28455646 is 64655482.

It is a junction number, because it is equal to n+sod(n) for n = 28455599 and 28455608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28455643) 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, 2265 + ... + 7876.

It is an arithmetic number, because the mean of its divisors is an integer number (2829618).

Almost surely, 2^28455646 is an apocalyptic number.

28455646 is a deficient number, since it is larger than the sum of its proper divisors (16818242).

28455646 is a wasteful number, since it uses less digits than its factorization.

28455646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10227.

The product of its digits is 230400, while the sum is 40.

The square root of 28455646 is about 5334.3833757989. The cubic root of 28455646 is about 305.2971966518.

The spelling of 28455646 in words is "twenty-eight million, four hundred fifty-five thousand, six hundred forty-six".