28451977412 has 6 divisors (see below), whose sum is σ = 49790960478. Its totient is φ = 14225988704.

The previous prime is 28451977409. The next prime is 28451977441. The reversal of 28451977412 is 21477915482.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 25095629056 + 3356348356 = 158416^2 + 57934^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3556497173 + ... + 3556497180.

It is an arithmetic number, because the mean of its divisors is an integer number (8298493413).

Almost surely, 2^28451977412 is an apocalyptic number.

It is an amenable number.

28451977412 is a deficient number, since it is larger than the sum of its proper divisors (21338983066).

28451977412 is a wasteful number, since it uses less digits than its factorization.

28451977412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7112994357 (or 7112994355 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 50.

The spelling of 28451977412 in words is "twenty-eight billion, four hundred fifty-one million, nine hundred seventy-seven thousand, four hundred twelve".