28780234153 has 24 divisors (see below), whose sum is σ = 32198021856. Its totient is φ = 25512278400.

The previous prime is 28780234141. The next prime is 28780234169. The reversal of 28780234153 is 35143208782.

It is not a de Polignac number, because 28780234153 - 2¹³ = 28780225961 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (28780234183) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22189201 + ... + 22190497.

It is an arithmetic number, because the mean of its divisors is an integer number (1341584244).

Almost surely, 2^28780234153 is an apocalyptic number.

It is an amenable number.

28780234153 is a deficient number, since it is larger than the sum of its proper divisors (3417787703).

28780234153 is a wasteful number, since it uses less digits than its factorization.

28780234153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2485 (or 2442 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 43.

The spelling of 28780234153 in words is "twenty-eight billion, seven hundred eighty million, two hundred thirty-four thousand, one hundred fifty-three".