28477908 has 18 divisors (see below), whose sum is σ = 71985914. Its totient is φ = 9492624.

The previous prime is 28477879. The next prime is 28477919. The reversal of 28477908 is 80977482.

It can be written as a sum of positive squares in only one way, i.e., 18818244 + 9659664 = 4338^2 + 3108^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a nialpdrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 395491 + ... + 395562.

Almost surely, 2^28477908 is an apocalyptic number.

It is an amenable number.

28477908 is an abundant number, since it is smaller than the sum of its proper divisors (43508006).

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

28477908 is a wasteful number, since it uses less digits than its factorization.

28477908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791063 (or 791058 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 28477908 is about 5336.4696195144. The cubic root of 28477908 is about 305.3767913371.

The spelling of 28477908 in words is "twenty-eight million, four hundred seventy-seven thousand, nine hundred eight".