278898222480 has 40 divisors (see below), whose sum is σ = 864584490432. Its totient is φ = 74372859264.

The previous prime is 278898222461. The next prime is 278898222487. The reversal of 278898222480 is 84222898872.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is not an unprimeable number, because it can be changed into a prime (278898222487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 581037724 + ... + 581038203.

Almost surely, 2^278898222480 is an apocalyptic number.

278898222480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

278898222480 is an abundant number, since it is smaller than the sum of its proper divisors (585686267952).

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

278898222480 is a wasteful number, since it uses less digits than its factorization.

278898222480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162075943 (or 1162075937 counting only the distinct ones).

The product of its (nonzero) digits is 16515072, while the sum is 60.

The spelling of 278898222480 in words is "two hundred seventy-eight billion, eight hundred ninety-eight million, two hundred twenty-two thousand, four hundred eighty".