28249794 has 24 divisors (see below), whose sum is σ = 61305660. Its totient is φ = 9401568.

The previous prime is 28249787. The next prime is 28249807. The reversal of 28249794 is 49794282.

It can be written as a sum of positive squares in 2 ways, for example, as 23648769 + 4601025 = 4863^2 + 2145^2 .

It is a super-2 number, since 2×28249794² = 1596101722084872, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21484 + ... + 22760.

Almost surely, 2^28249794 is an apocalyptic number.

28249794 is an abundant number, since it is smaller than the sum of its proper divisors (33055866).

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

28249794 is a wasteful number, since it uses less digits than its factorization.

28249794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2514 (or 2511 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 28249794 is about 5315.0535274821. The cubic root of 28249794 is about 304.5592271568.

The spelling of 28249794 in words is "twenty-eight million, two hundred forty-nine thousand, seven hundred ninety-four".