28378922987382 has 32 divisors (see below), whose sum is σ = 62701417889280. Its totient is φ = 8490817002720.

The previous prime is 28378922987341. The next prime is 28378922987383.

28378922987382 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 28378922987298 and 28378922987307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28378922987383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2721410493 + ... + 2721420920.

It is an arithmetic number, because the mean of its divisors is an integer number (1959419309040).

Almost surely, 2^{28378922987382} is an apocalyptic number.

28378922987382 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28378922987382 is an abundant number, since it is smaller than the sum of its proper divisors (34322494901898).

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

28378922987382 is a wasteful number, since it uses less digits than its factorization.

28378922987382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5442831508.

The product of its digits is 2341011456, while the sum is 78.

The spelling of 28378922987382 in words is "twenty-eight trillion, three hundred seventy-eight billion, nine hundred twenty-two million, nine hundred eighty-seven thousand, three hundred eighty-two".