28002783 has 8 divisors (see below), whose sum is σ = 37422000. Its totient is φ = 18626048.

The previous prime is 28002781. The next prime is 28002787. The reversal of 28002783 is 38720082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28002783 - 2¹ = 28002781 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28002783.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28002781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9048 + ... + 11741.

It is an arithmetic number, because the mean of its divisors is an integer number (4677750).

Almost surely, 2^28002783 is an apocalyptic number.

28002783 is a deficient number, since it is larger than the sum of its proper divisors (9419217).

28002783 is a wasteful number, since it uses less digits than its factorization.

28002783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21241.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 28002783 is about 5291.7655843773. The cubic root of 28002783 is about 303.6689573627.

The spelling of 28002783 in words is "twenty-eight million, two thousand, seven hundred eighty-three".