28941524779 has 4 divisors (see below), whose sum is σ = 28942680520. Its totient is φ = 28940369040.

The previous prime is 28941524771. The next prime is 28941524783. The reversal of 28941524779 is 97742514982.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28941524779 - 2³ = 28941524771 is a prime.

It is a super-2 number, since 2×28941524779² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28941524771) 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, 539457 + ... + 590674.

It is an arithmetic number, because the mean of its divisors is an integer number (7235670130).

Almost surely, 2^28941524779 is an apocalyptic number.

28941524779 is a deficient number, since it is larger than the sum of its proper divisors (1155741).

28941524779 is a wasteful number, since it uses less digits than its factorization.

28941524779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155740.

The product of its digits is 10160640, while the sum is 58.

The spelling of 28941524779 in words is "twenty-eight billion, nine hundred forty-one million, five hundred twenty-four thousand, seven hundred seventy-nine".