278602240 has 120 divisors (see below), whose sum is σ = 777402252. Its totient is φ = 95477760.

The previous prime is 278602231. The next prime is 278602249. The reversal of 278602240 is 42206872.

It is an interprime number because it is at equal distance from previous prime (278602231) and next prime (278602249).

It can be written as a sum of positive squares in 2 ways, for example, as 278489344 + 112896 = 16688^2 + 336^2 .

It is not an unprimeable number, because it can be changed into a prime (278602249) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 124330 + ... + 126550.

Almost surely, 2^278602240 is an apocalyptic number.

278602240 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 278602240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (388701126).

278602240 is an abundant number, since it is smaller than the sum of its proper divisors (498800012).

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

278602240 is an equidigital number, since it uses as much as digits as its factorization.

278602240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2258 (or 2235 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 278602240 is about 16691.3822075944. The cubic root of 278602240 is about 653.1228346807.

The spelling of 278602240 in words is "two hundred seventy-eight million, six hundred two thousand, two hundred forty".