28378342236 has 24 divisors (see below), whose sum is σ = 66802118544. Its totient is φ = 9375735040.

The previous prime is 28378342193. The next prime is 28378342247. The reversal of 28378342236 is 63224387382.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10462635 + ... + 10465346.

It is an arithmetic number, because the mean of its divisors is an integer number (2783421606).

Almost surely, 2^28378342236 is an apocalyptic number.

It is an amenable number.

28378342236 is an abundant number, since it is smaller than the sum of its proper divisors (38423776308).

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

28378342236 is a wasteful number, since it uses less digits than its factorization.

28378342236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20928101 (or 20928099 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 48.

The spelling of 28378342236 in words is "twenty-eight billion, three hundred seventy-eight million, three hundred forty-two thousand, two hundred thirty-six".