278196240 has 160 divisors (see below), whose sum is σ = 1008792576. Its totient is φ = 62092800.

The previous prime is 278196203. The next prime is 278196241. The reversal of 278196240 is 42691872.

It is not an unprimeable number, because it can be changed into a prime (278196241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70315 + ... + 74165.

Almost surely, 2^278196240 is an apocalyptic number.

278196240 is a gapful number since it is divisible by the number (20) 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 278196240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (504396288).

278196240 is an abundant number, since it is smaller than the sum of its proper divisors (730596336).

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

278196240 is a wasteful number, since it uses less digits than its factorization.

278196240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3917 (or 3911 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 278196240 is about 16679.2158089042. The cubic root of 278196240 is about 652.8054206465.

The spelling of 278196240 in words is "two hundred seventy-eight million, one hundred ninety-six thousand, two hundred forty".