28763133 has 64 divisors (see below), whose sum is σ = 50429952. Its totient is φ = 14192640.

The previous prime is 28763129. The next prime is 28763159. The reversal of 28763133 is 33136782.

It is not a de Polignac number, because 28763133 - 2² = 28763129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28763094 and 28763103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28763233) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 254485 + ... + 254597.

It is an arithmetic number, because the mean of its divisors is an integer number (787968).

Almost surely, 2^28763133 is an apocalyptic number.

28763133 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

28763133 is a deficient number, since it is larger than the sum of its proper divisors (21666819).

28763133 is a wasteful number, since it uses less digits than its factorization.

28763133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194.

The product of its digits is 18144, while the sum is 33.

The square root of 28763133 is about 5363.1271661224. The cubic root of 28763133 is about 306.3929229880.

The spelling of 28763133 in words is "twenty-eight million, seven hundred sixty-three thousand, one hundred thirty-three".