278853240 has 32 divisors (see below), whose sum is σ = 836560080. Its totient is φ = 74360832.

The previous prime is 278853233. The next prime is 278853247. The reversal of 278853240 is 42358872.

278853240 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (278853233) and next prime (278853247).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278853247) 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, 1161769 + ... + 1162008.

Almost surely, 2^278853240 is an apocalyptic number.

278853240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

278853240 is an abundant number, since it is smaller than the sum of its proper divisors (557706840).

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

278853240 is a wasteful number, since it uses less digits than its factorization.

278853240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2323791 (or 2323787 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 39.

The square root of 278853240 is about 16698.8993649282. The cubic root of 278853240 is about 653.3189142544.

It can be divided in two parts, 27885 and 3240, that added together give a triangular number (31125 = T₂₄₉).

The spelling of 278853240 in words is "two hundred seventy-eight million, eight hundred fifty-three thousand, two hundred forty".