28477905 has 8 divisors (see below), whose sum is σ = 45564672. Its totient is φ = 15188208.

The previous prime is 28477879. The next prime is 28477919. The reversal of 28477905 is 50977482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28477905 - 2⁷ = 28477777 is a prime.

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, 949249 + ... + 949278.

It is an arithmetic number, because the mean of its divisors is an integer number (5695584).

Almost surely, 2^28477905 is an apocalyptic number.

It is an amenable number.

28477905 is a deficient number, since it is larger than the sum of its proper divisors (17086767).

28477905 is a wasteful number, since it uses less digits than its factorization.

28477905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1898535.

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 28477905 is about 5336.4693384297. The cubic root of 28477905 is about 305.3767806138.

The spelling of 28477905 in words is "twenty-eight million, four hundred seventy-seven thousand, nine hundred five".