28799640524 has 12 divisors (see below), whose sum is σ = 50435406000. Its totient is φ = 14389524528.

The previous prime is 28799640481. The next prime is 28799640539. The reversal of 28799640524 is 42504699782.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28799640524.

It is an unprimeable number.

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, 2567639 + ... + 2578830.

It is an arithmetic number, because the mean of its divisors is an integer number (4202950500).

Almost surely, 2^28799640524 is an apocalyptic number.

It is an amenable number.

28799640524 is a deficient number, since it is larger than the sum of its proper divisors (21635765476).

28799640524 is a wasteful number, since it uses less digits than its factorization.

28799640524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5147872 (or 5147870 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 56.

The spelling of 28799640524 in words is "twenty-eight billion, seven hundred ninety-nine million, six hundred forty thousand, five hundred twenty-four".