28726975974 has 16 divisors (see below), whose sum is σ = 57834443520. Its totient is φ = 9512243400.

The previous prime is 28726975939. The next prime is 28726975993. The reversal of 28726975974 is 47957962782.

It is a super-2 number, since 2×28726975974² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15852834 + ... + 15854645.

It is an arithmetic number, because the mean of its divisors is an integer number (3614652720).

Almost surely, 2^28726975974 is an apocalyptic number.

28726975974 is an abundant number, since it is smaller than the sum of its proper divisors (29107467546).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28726975974 is a wasteful number, since it uses less digits than its factorization.

28726975974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31707635.

The product of its digits is 106686720, while the sum is 66.

The spelling of 28726975974 in words is "twenty-eight billion, seven hundred twenty-six million, nine hundred seventy-five thousand, nine hundred seventy-four".