28641806344 has 32 divisors (see below), whose sum is σ = 56347986240. Its totient is φ = 13622558400.

The previous prime is 28641806311. The next prime is 28641806353. The reversal of 28641806344 is 44360814682.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a junction number, because it is equal to n+sod(n) for n = 28641806294 and 28641806303.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 396702 + ... + 463309.

It is an arithmetic number, because the mean of its divisors is an integer number (1760874570).

Almost surely, 2^28641806344 is an apocalyptic number.

It is an amenable number.

28641806344 is a deficient number, since it is larger than the sum of its proper divisors (27706179896).

28641806344 is a wasteful number, since it uses less digits than its factorization.

28641806344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860221 (or 860217 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 46.

The spelling of 28641806344 in words is "twenty-eight billion, six hundred forty-one million, eight hundred six thousand, three hundred forty-four".