28307757088 has 192 divisors, whose sum is σ = 65031482880. Its totient is φ = 12018585600.

The previous prime is 28307757083. The next prime is 28307757091. The reversal of 28307757088 is 88075770382.

It is a super-2 number, since 2×28307757088² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28307757083) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 67239118 + ... + 67239538.

It is an arithmetic number, because the mean of its divisors is an integer number (338705640).

Almost surely, 2^28307757088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28307757088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32515741440).

28307757088 is an abundant number, since it is smaller than the sum of its proper divisors (36723725792).

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

28307757088 is a wasteful number, since it uses less digits than its factorization.

28307757088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691 (or 683 counting only the distinct ones).

The product of its (nonzero) digits is 5268480, while the sum is 55.

The spelling of 28307757088 in words is "twenty-eight billion, three hundred seven million, seven hundred fifty-seven thousand, eighty-eight".