28458162779 has 4 divisors (see below), whose sum is σ = 29955960840. Its totient is φ = 26960364720.

The previous prime is 28458162713. The next prime is 28458162827. The reversal of 28458162779 is 97726185482.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28458162779 is a prime.

It is a super-2 number, since 2×28458162779² (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 (28458162709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 748899002 + ... + 748899039.

It is an arithmetic number, because the mean of its divisors is an integer number (7488990210).

Almost surely, 2^28458162779 is an apocalyptic number.

28458162779 is a deficient number, since it is larger than the sum of its proper divisors (1497798061).

28458162779 is a wasteful number, since it uses less digits than its factorization.

28458162779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1497798060.

The product of its digits is 13547520, while the sum is 59.

The spelling of 28458162779 in words is "twenty-eight billion, four hundred fifty-eight million, one hundred sixty-two thousand, seven hundred seventy-nine".