278789292232 has 64 divisors (see below), whose sum is σ = 589394427840. Its totient is φ = 122511916800.

The previous prime is 278789292211. The next prime is 278789292239. The reversal of 278789292232 is 232292987872.

It is not an unprimeable number, because it can be changed into a prime (278789292239) 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, 238507 + ... + 783877.

It is an arithmetic number, because the mean of its divisors is an integer number (9209287935).

Almost surely, 2^278789292232 is an apocalyptic number.

278789292232 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 278789292232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294697213920).

278789292232 is an abundant number, since it is smaller than the sum of its proper divisors (310605135608).

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

278789292232 is a wasteful number, since it uses less digits than its factorization.

278789292232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545582 (or 545578 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 61.

The spelling of 278789292232 in words is "two hundred seventy-eight billion, seven hundred eighty-nine million, two hundred ninety-two thousand, two hundred thirty-two".