28157833 has 8 divisors (see below), whose sum is σ = 31088736. Its totient is φ = 25288800.

The previous prime is 28157821. The next prime is 28157863. The reversal of 28157833 is 33875182.

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 28157833 - 2²¹ = 26060681 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28157792 and 28157801.

It is not an unprimeable number, because it can be changed into a prime (28157813) 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, 14508 + ... + 16333.

It is an arithmetic number, because the mean of its divisors is an integer number (3886092).

Almost surely, 2^28157833 is an apocalyptic number.

It is an amenable number.

28157833 is a deficient number, since it is larger than the sum of its proper divisors (2930903).

28157833 is a wasteful number, since it uses less digits than its factorization.

28157833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30935.

The product of its digits is 40320, while the sum is 37.

The square root of 28157833 is about 5306.3954809268. The cubic root of 28157833 is about 304.2283926854.

It can be divided in two parts, 2815 and 7833, that added together give a cube (10648 = 22³).

The spelling of 28157833 in words is "twenty-eight million, one hundred fifty-seven thousand, eight hundred thirty-three".