28742686278 has 32 divisors (see below), whose sum is σ = 60614144640. Its totient is φ = 9061153920.

The previous prime is 28742686229. The next prime is 28742686279. The reversal of 28742686278 is 87268624782.

It is a super-2 number, since 2×28742686278² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28742686279) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147843 + ... + 281678.

It is an arithmetic number, because the mean of its divisors is an integer number (1894192020).

Almost surely, 2^28742686278 is an apocalyptic number.

28742686278 is an abundant number, since it is smaller than the sum of its proper divisors (31871458362).

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

28742686278 is a wasteful number, since it uses less digits than its factorization.

28742686278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430132.

The product of its digits is 28901376, while the sum is 60.

The spelling of 28742686278 in words is "twenty-eight billion, seven hundred forty-two million, six hundred eighty-six thousand, two hundred seventy-eight".