28507492 has 12 divisors (see below), whose sum is σ = 53725756. Its totient is φ = 13157280.

The previous prime is 28507483. The next prime is 28507499. The reversal of 28507492 is 29470582.

It can be written as a sum of positive squares in 2 ways, for example, as 4946176 + 23561316 = 2224^2 + 4854^2 .

It is not an unprimeable number, because it can be changed into a prime (28507499) 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, 274059 + ... + 274162.

Almost surely, 2^28507492 is an apocalyptic number.

It is an amenable number.

28507492 is a deficient number, since it is larger than the sum of its proper divisors (25218264).

28507492 is a wasteful number, since it uses less digits than its factorization.

28507492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548238 (or 548236 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 28507492 is about 5339.2407699972. The cubic root of 28507492 is about 305.4825006517.

The spelling of 28507492 in words is "twenty-eight million, five hundred seven thousand, four hundred ninety-two".