28911422392 has 8 divisors (see below), whose sum is σ = 54208917000. Its totient is φ = 14455711192.

The previous prime is 28911422387. The next prime is 28911422401. The reversal of 28911422392 is 29322411982.

It is a tau number, because it is divible by the number of its divisors (8).

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, 1806963892 + ... + 1806963907.

It is an arithmetic number, because the mean of its divisors is an integer number (6776114625).

Almost surely, 2^28911422392 is an apocalyptic number.

It is an amenable number.

28911422392 is a deficient number, since it is larger than the sum of its proper divisors (25297494608).

28911422392 is a wasteful number, since it uses less digits than its factorization.

28911422392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3613927805 (or 3613927801 counting only the distinct ones).

The product of its digits is 124416, while the sum is 43.

The spelling of 28911422392 in words is "twenty-eight billion, nine hundred eleven million, four hundred twenty-two thousand, three hundred ninety-two".