28781757134 has 16 divisors (see below), whose sum is σ = 46497439968. Its totient is φ = 13282792992.

The previous prime is 28781757133. The next prime is 28781757167. The reversal of 28781757134 is 43175718782.

It is a happy number.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28781757133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336164 + ... + 413000.

It is an arithmetic number, because the mean of its divisors is an integer number (2906089998).

Almost surely, 2^28781757134 is an apocalyptic number.

28781757134 is a deficient number, since it is larger than the sum of its proper divisors (17715682834).

28781757134 is a wasteful number, since it uses less digits than its factorization.

28781757134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91259.

The product of its digits is 2634240, while the sum is 53.

The spelling of 28781757134 in words is "twenty-eight billion, seven hundred eighty-one million, seven hundred fifty-seven thousand, one hundred thirty-four".