28123333790 has 16 divisors (see below), whose sum is σ = 50683524768. Its totient is φ = 11235661536.

The previous prime is 28123333787. The next prime is 28123333807. The reversal of 28123333790 is 9733332182.

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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1700357 + ... + 1716816.

It is an arithmetic number, because the mean of its divisors is an integer number (3167720298).

Almost surely, 2^28123333790 is an apocalyptic number.

28123333790 is a deficient number, since it is larger than the sum of its proper divisors (22560190978).

28123333790 is a wasteful number, since it uses less digits than its factorization.

28123333790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3418003.

The product of its (nonzero) digits is 163296, while the sum is 41.

The spelling of 28123333790 in words is "twenty-eight billion, one hundred twenty-three million, three hundred thirty-three thousand, seven hundred ninety".