28402763 has 4 divisors (see below), whose sum is σ = 28415208. Its totient is φ = 28390320.

The previous prime is 28402691. The next prime is 28402771. The reversal of 28402763 is 36720482.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28402763 - 2¹⁰ = 28401739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28402793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1706 + ... + 7727.

It is an arithmetic number, because the mean of its divisors is an integer number (7103802).

Almost surely, 2^28402763 is an apocalyptic number.

28402763 is a deficient number, since it is larger than the sum of its proper divisors (12445).

28402763 is an equidigital number, since it uses as much as digits as its factorization.

28402763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12444.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 28402763 is about 5329.4242653405. The cubic root of 28402763 is about 305.1079542604.

The spelling of 28402763 in words is "twenty-eight million, four hundred two thousand, seven hundred sixty-three".