28005026790 has 64 divisors (see below), whose sum is σ = 73298534400. Its totient is φ = 6806277504.

The previous prime is 28005026779. The next prime is 28005026837. The reversal of 28005026790 is 9762050082.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 423670 + ... + 485289.

It is an arithmetic number, because the mean of its divisors is an integer number (1145289600).

Almost surely, 2^28005026790 is an apocalyptic number.

28005026790 is an abundant number, since it is smaller than the sum of its proper divisors (45293507610).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28005026790 is a wasteful number, since it uses less digits than its factorization.

28005026790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909061.

The product of its (nonzero) digits is 60480, while the sum is 39.

The spelling of 28005026790 in words is "twenty-eight billion, five million, twenty-six thousand, seven hundred ninety".