28478846 has 16 divisors (see below), whose sum is σ = 47739888. Its totient is φ = 12628800.

The previous prime is 28478839. The next prime is 28478873. The reversal of 28478846 is 64887482.

It is a happy number.

It is a super-2 number, since 2×28478846² = 1622089338983432, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28478846.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14885 + ... + 16688.

It is an arithmetic number, because the mean of its divisors is an integer number (2983743).

Almost surely, 2^28478846 is an apocalyptic number.

28478846 is a deficient number, since it is larger than the sum of its proper divisors (19261042).

28478846 is a wasteful number, since it uses less digits than its factorization.

28478846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31627.

The product of its digits is 688128, while the sum is 47.

The square root of 28478846 is about 5336.5575046091. The cubic root of 28478846 is about 305.3801441148.

It can be divided in two parts, 28 and 478846, that added together give a palindrome (478874).

The spelling of 28478846 in words is "twenty-eight million, four hundred seventy-eight thousand, eight hundred forty-six".