28156072033 has 4 divisors (see below), whose sum is σ = 28157296320. Its totient is φ = 28154847748.

The previous prime is 28156072019. The next prime is 28156072111. The reversal of 28156072033 is 33027065182.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28156072033 - 2¹⁷ = 28155940961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28156071983 and 28156072001.

It is not an unprimeable number, because it can be changed into a prime (28156072433) 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, 576973 + ... + 623866.

It is an arithmetic number, because the mean of its divisors is an integer number (7039324080).

Almost surely, 2^28156072033 is an apocalyptic number.

It is an amenable number.

28156072033 is a deficient number, since it is larger than the sum of its proper divisors (1224287).

28156072033 is a wasteful number, since it uses less digits than its factorization.

28156072033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224286.

The product of its (nonzero) digits is 60480, while the sum is 37.

The spelling of 28156072033 in words is "twenty-eight billion, one hundred fifty-six million, seventy-two thousand, thirty-three".