28461905 has 16 divisors (see below), whose sum is σ = 37195200. Its totient is φ = 20825280.

The previous prime is 28461899. The next prime is 28461907. The reversal of 28461905 is 50916482.

It is not a de Polignac number, because 28461905 - 2⁴ = 28461889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28461907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2411 + ... + 7920.

It is an arithmetic number, because the mean of its divisors is an integer number (2324700).

Almost surely, 2^28461905 is an apocalyptic number.

It is an amenable number.

28461905 is a deficient number, since it is larger than the sum of its proper divisors (8733295).

28461905 is a wasteful number, since it uses less digits than its factorization.

28461905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10384.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 28461905 is about 5334.9700092878. The cubic root of 28461905 is about 305.3195790297.

The spelling of 28461905 in words is "twenty-eight million, four hundred sixty-one thousand, nine hundred five".