28020476 has 12 divisors (see below), whose sum is σ = 53493720. Its totient is φ = 12736560.

The previous prime is 28020449. The next prime is 28020479. The reversal of 28020476 is 67402082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28020479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318371 + ... + 318458.

It is an arithmetic number, because the mean of its divisors is an integer number (4457810).

Almost surely, 2^28020476 is an apocalyptic number.

It is an amenable number.

28020476 is a deficient number, since it is larger than the sum of its proper divisors (25473244).

28020476 is a wasteful number, since it uses less digits than its factorization.

28020476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636844 (or 636842 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 28020476 is about 5293.4370686729. The cubic root of 28020476 is about 303.7328996227.

The spelling of 28020476 in words is "twenty-eight million, twenty thousand, four hundred seventy-six".