278942796132 has 192 divisors, whose sum is σ = 904026009600. Its totient is φ = 64573125120.

The previous prime is 278942796127. The next prime is 278942796133. The reversal of 278942796132 is 231697249872.

It is a super-2 number, since 2×278942796132² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (278942796133) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 52032 + ... + 748727.

It is an arithmetic number, because the mean of its divisors is an integer number (4708468800).

Almost surely, 2^278942796132 is an apocalyptic number.

278942796132 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 278942796132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (452013004800).

278942796132 is an abundant number, since it is smaller than the sum of its proper divisors (625083213468).

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

278942796132 is a wasteful number, since it uses less digits than its factorization.

278942796132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800826 (or 800824 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 60.

The spelling of 278942796132 in words is "two hundred seventy-eight billion, nine hundred forty-two million, seven hundred ninety-six thousand, one hundred thirty-two".