28439129692 has 12 divisors (see below), whose sum is σ = 49770624960. Its totient is φ = 14218951136.

The previous prime is 28439129639. The next prime is 28439129737. The reversal of 28439129692 is 29692193482.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39817 + ... + 241792.

It is an arithmetic number, because the mean of its divisors is an integer number (4147552080).

Almost surely, 2^28439129692 is an apocalyptic number.

It is an amenable number.

28439129692 is a deficient number, since it is larger than the sum of its proper divisors (21331495268).

28439129692 is a wasteful number, since it uses less digits than its factorization.

28439129692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306860 (or 306858 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 55.

The spelling of 28439129692 in words is "twenty-eight billion, four hundred thirty-nine million, one hundred twenty-nine thousand, six hundred ninety-two".