28354697772 has 24 divisors (see below), whose sum is σ = 66496809456. Its totient is φ = 9403587648.

The previous prime is 28354697743. The next prime is 28354697773. The reversal of 28354697772 is 27779645382.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28354697773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5994823 + ... + 5999550.

It is an arithmetic number, because the mean of its divisors is an integer number (2770700394).

Almost surely, 2^28354697772 is an apocalyptic number.

It is an amenable number.

28354697772 is an abundant number, since it is smaller than the sum of its proper divisors (38142111684).

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

28354697772 is a wasteful number, since it uses less digits than its factorization.

28354697772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11994577 (or 11994575 counting only the distinct ones).

The product of its digits is 35562240, while the sum is 60.

The spelling of 28354697772 in words is "twenty-eight billion, three hundred fifty-four million, six hundred ninety-seven thousand, seven hundred seventy-two".