28947400269 has 4 divisors (see below), whose sum is σ = 38596533696. Its totient is φ = 19298266844.

The previous prime is 28947400247. The next prime is 28947400357. The reversal of 28947400269 is 96200474982.

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 28947400269 - 2²¹ = 28945303117 is a prime.

It is a super-2 number, since 2×28947400269² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28947400219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4824566709 + ... + 4824566714.

It is an arithmetic number, because the mean of its divisors is an integer number (9649133424).

Almost surely, 2^28947400269 is an apocalyptic number.

It is an amenable number.

28947400269 is a deficient number, since it is larger than the sum of its proper divisors (9649133427).

28947400269 is an equidigital number, since it uses as much as digits as its factorization.

28947400269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9649133426.

The product of its (nonzero) digits is 1741824, while the sum is 51.

The spelling of 28947400269 in words is "twenty-eight billion, nine hundred forty-seven million, four hundred thousand, two hundred sixty-nine".