28783270469 has 8 divisors (see below), whose sum is σ = 31185158400. Its totient is φ = 26460133056.

The previous prime is 28783270457. The next prime is 28783270511. The reversal of 28783270469 is 96407238782.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28783270469 is a prime.

It is a super-2 number, since 2×28783270469² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28783270669) 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, 19686869 + ... + 19688330.

It is an arithmetic number, because the mean of its divisors is an integer number (3898144800).

Almost surely, 2^28783270469 is an apocalyptic number.

It is an amenable number.

28783270469 is a deficient number, since it is larger than the sum of its proper divisors (2401887931).

28783270469 is a wasteful number, since it uses less digits than its factorization.

28783270469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39375259.

The product of its (nonzero) digits is 8128512, while the sum is 56.

The spelling of 28783270469 in words is "twenty-eight billion, seven hundred eighty-three million, two hundred seventy thousand, four hundred sixty-nine".