28380357192 has 128 divisors (see below), whose sum is σ = 82241308800. Its totient is φ = 8093849600.

The previous prime is 28380357191. The next prime is 28380357221. The reversal of 28380357192 is 29175308382.

It is a happy number.

It is a super-2 number, since 2×28380357192² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28380357191) 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 31 ways as a sum of consecutive naturals, for example, 1286092 + ... + 1307972.

It is an arithmetic number, because the mean of its divisors is an integer number (642510225).

Almost surely, 2^28380357192 is an apocalyptic number.

28380357192 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28380357192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41120654400).

28380357192 is an abundant number, since it is smaller than the sum of its proper divisors (53860951608).

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

28380357192 is a wasteful number, since it uses less digits than its factorization.

28380357192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21952 (or 21914 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 28380357192 in words is "twenty-eight billion, three hundred eighty million, three hundred fifty-seven thousand, one hundred ninety-two".