28734639692 has 12 divisors (see below), whose sum is σ = 54857039496. Its totient is φ = 13061199840.

The previous prime is 28734639643. The next prime is 28734639697. The reversal of 28734639692 is 29693643782.

It is not an unprimeable number, because it can be changed into a prime (28734639697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 326529953 + ... + 326530040.

It is an arithmetic number, because the mean of its divisors is an integer number (4571419958).

Almost surely, 2^28734639692 is an apocalyptic number.

28734639692 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28734639692 is a deficient number, since it is larger than the sum of its proper divisors (26122399804).

28734639692 is a wasteful number, since it uses less digits than its factorization.

28734639692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653060008 (or 653060006 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 59.

The spelling of 28734639692 in words is "twenty-eight billion, seven hundred thirty-four million, six hundred thirty-nine thousand, six hundred ninety-two".