28126457079 has 32 divisors (see below), whose sum is σ = 44789268480. Its totient is φ = 15364454112.

The previous prime is 28126457063. The next prime is 28126457141. The reversal of 28126457079 is 97075462182.

It is a happy number.

It is not a de Polignac number, because 28126457079 - 2⁴ = 28126457063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28126457039) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 288919 + ... + 373800.

It is an arithmetic number, because the mean of its divisors is an integer number (1399664640).

Almost surely, 2^28126457079 is an apocalyptic number.

28126457079 is a deficient number, since it is larger than the sum of its proper divisors (16662811401).

28126457079 is a wasteful number, since it uses less digits than its factorization.

28126457079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662819.

The product of its (nonzero) digits is 1693440, while the sum is 51.

The spelling of 28126457079 in words is "twenty-eight billion, one hundred twenty-six million, four hundred fifty-seven thousand, seventy-nine".