28046745 has 12 divisors (see below), whose sum is σ = 48614436. Its totient is φ = 14958240.

The previous prime is 28046737. The next prime is 28046749. The reversal of 28046745 is 54764082.

It can be written as a sum of positive squares in 2 ways, for example, as 5035536 + 23011209 = 2244^2 + 4797^2 .

It is not a de Polignac number, because 28046745 - 2³ = 28046737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28046749) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 311586 + ... + 311675.

It is an arithmetic number, because the mean of its divisors is an integer number (4051203).

Almost surely, 2^28046745 is an apocalyptic number.

It is an amenable number.

28046745 is a deficient number, since it is larger than the sum of its proper divisors (20567691).

28046745 is a wasteful number, since it uses less digits than its factorization.

28046745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623272 (or 623269 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 28046745 is about 5295.9177674885. The cubic root of 28046745 is about 303.8277857992.

The spelling of 28046745 in words is "twenty-eight million, forty-six thousand, seven hundred forty-five".