28002798 has 12 divisors (see below), whose sum is σ = 60672768. Its totient is φ = 9334260.

The previous prime is 28002797. The next prime is 28002803. The reversal of 28002798 is 89720082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28002797) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 777838 + ... + 777873.

It is an arithmetic number, because the mean of its divisors is an integer number (5056064).

Almost surely, 2^28002798 is an apocalyptic number.

28002798 is an abundant number, since it is smaller than the sum of its proper divisors (32669970).

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

28002798 is a wasteful number, since it uses less digits than its factorization.

28002798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1555719 (or 1555716 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 28002798 is about 5291.7670016734. The cubic root of 28002798 is about 303.6690115839.

The spelling of 28002798 in words is "twenty-eight million, two thousand, seven hundred ninety-eight".