28738688534 has 4 divisors (see below), whose sum is σ = 43108032804. Its totient is φ = 14369344266.

The previous prime is 28738688527. The next prime is 28738688549. The reversal of 28738688534 is 43588683782.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7184672132 + ... + 7184672135.

It is an arithmetic number, because the mean of its divisors is an integer number (10777008201).

Almost surely, 2^28738688534 is an apocalyptic number.

28738688534 is a deficient number, since it is larger than the sum of its proper divisors (14369344270).

28738688534 is a wasteful number, since it uses less digits than its factorization.

28738688534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14369344269.

The product of its digits is 61931520, while the sum is 62.

The spelling of 28738688534 in words is "twenty-eight billion, seven hundred thirty-eight million, six hundred eighty-eight thousand, five hundred thirty-four".