28507946 has 16 divisors (see below), whose sum is σ = 45790920. Its totient is φ = 13263360.

The previous prime is 28507943. The next prime is 28507967. The reversal of 28507946 is 64970582.

It can be written as a sum of positive squares in 4 ways, for example, as 21949225 + 6558721 = 4685^2 + 2561^2 .

It is not an unprimeable number, because it can be changed into a prime (28507943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1685 + ... + 7736.

Almost surely, 2^28507946 is an apocalyptic number.

28507946 is a deficient number, since it is larger than the sum of its proper divisors (17282974).

28507946 is a wasteful number, since it uses less digits than its factorization.

28507946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9529.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 28507946 is about 5339.2832852360. The cubic root of 28507946 is about 305.4841223110.

The spelling of 28507946 in words is "twenty-eight million, five hundred seven thousand, nine hundred forty-six".