28274490 has 24 divisors (see below), whose sum is σ = 73513908. Its totient is φ = 7539840.

The previous prime is 28274483. The next prime is 28274497. The reversal of 28274490 is 9447282.

It is an interprime number because it is at equal distance from previous prime (28274483) and next prime (28274497).

It can be written as a sum of positive squares in 2 ways, for example, as 28100601 + 173889 = 5301^2 + 417^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28274497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156991 + ... + 157170.

Almost surely, 2^28274490 is an apocalyptic number.

28274490 is an abundant number, since it is smaller than the sum of its proper divisors (45239418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28274490 is a wasteful number, since it uses less digits than its factorization.

28274490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314174 (or 314171 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 28274490 is about 5317.3762326922. The cubic root of 28274490 is about 304.6479499749.

The spelling of 28274490 in words is "twenty-eight million, two hundred seventy-four thousand, four hundred ninety".