28670735388 has 12 divisors (see below), whose sum is σ = 66898382600. Its totient is φ = 9556911792.

The previous prime is 28670735383. The next prime is 28670735419. The reversal of 28670735388 is 88353707682.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×28670735388² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28670735381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1194613963 + ... + 1194613986.

Almost surely, 2^28670735388 is an apocalyptic number.

It is an amenable number.

28670735388 is an abundant number, since it is smaller than the sum of its proper divisors (38227647212).

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

28670735388 is a wasteful number, since it uses less digits than its factorization.

28670735388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2389227956 (or 2389227954 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 57.

The spelling of 28670735388 in words is "twenty-eight billion, six hundred seventy million, seven hundred thirty-five thousand, three hundred eighty-eight".