28477836 has 36 divisors (see below), whose sum is σ = 72668232. Its totient is φ = 9402624.

The previous prime is 28477829. The next prime is 28477837. The reversal of 28477836 is 63877482.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 28477791 and 28477800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28477837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156 + ... + 7548.

It is an arithmetic number, because the mean of its divisors is an integer number (2018562).

Almost surely, 2^28477836 is an apocalyptic number.

It is an amenable number.

28477836 is an abundant number, since it is smaller than the sum of its proper divisors (44190396).

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

28477836 is a wasteful number, since it uses less digits than its factorization.

28477836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7510 (or 7505 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 28477836 is about 5336.4628734771. The cubic root of 28477836 is about 305.3765339779.

The spelling of 28477836 in words is "twenty-eight million, four hundred seventy-seven thousand, eight hundred thirty-six".