278998396432 has 120 divisors (see below), whose sum is σ = 671955950400. Its totient is φ = 109622626560.

The previous prime is 278998396399. The next prime is 278998396433. The reversal of 278998396432 is 234693899872.

It is not an unprimeable number, because it can be changed into a prime (278998396433) 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 23 ways as a sum of consecutive naturals, for example, 1976794 + ... + 2113222.

It is an arithmetic number, because the mean of its divisors is an integer number (5599632920).

Almost surely, 2^278998396432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 278998396432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335977975200).

278998396432 is an abundant number, since it is smaller than the sum of its proper divisors (392957553968).

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

278998396432 is a wasteful number, since it uses less digits than its factorization.

278998396432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136525 (or 136488 counting only the distinct ones).

The product of its digits is 282175488, while the sum is 70.

The spelling of 278998396432 in words is "two hundred seventy-eight billion, nine hundred ninety-eight million, three hundred ninety-six thousand, four hundred thirty-two".