28923311438 has 24 divisors (see below), whose sum is σ = 50584856112. Its totient is φ = 12367059264.

The previous prime is 28923311423. The next prime is 28923311441. The reversal of 28923311438 is 83411332982.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 298370 + ... + 383237.

It is an arithmetic number, because the mean of its divisors is an integer number (2107702338).

Almost surely, 2^28923311438 is an apocalyptic number.

28923311438 is a deficient number, since it is larger than the sum of its proper divisors (21661544674).

28923311438 is a wasteful number, since it uses less digits than its factorization.

28923311438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682056 (or 682049 counting only the distinct ones).

The product of its digits is 248832, while the sum is 44.

The spelling of 28923311438 in words is "twenty-eight billion, nine hundred twenty-three million, three hundred eleven thousand, four hundred thirty-eight".