28495890 has 24 divisors (see below), whose sum is σ = 74089548. Its totient is φ = 7598880.

The previous prime is 28495889. The next prime is 28495891. The reversal of 28495890 is 9859482.

28495890 is a `hidden beast` number, since 28 + 49 + 589 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (28495889) and next prime (28495891).

It can be written as a sum of positive squares in 2 ways, for example, as 28483569 + 12321 = 5337^2 + 111^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (28495891) 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, 158221 + ... + 158400.

Almost surely, 2^28495890 is an apocalyptic number.

28495890 is an abundant number, since it is smaller than the sum of its proper divisors (45593658).

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

28495890 is a wasteful number, since it uses less digits than its factorization.

28495890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316634 (or 316631 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 28495890 is about 5338.1541753681. The cubic root of 28495890 is about 305.4410531977.

The spelling of 28495890 in words is "twenty-eight million, four hundred ninety-five thousand, eight hundred ninety".