278253140 has 24 divisors (see below), whose sum is σ = 637453152. Its totient is φ = 101182880.

The previous prime is 278253109. The next prime is 278253167. The reversal of 278253140 is 41352872.

It is a junction number, because it is equal to n+sod(n) for n = 278253097 and 278253106.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 632174 + ... + 632613.

It is an arithmetic number, because the mean of its divisors is an integer number (26560548).

Almost surely, 2^278253140 is an apocalyptic number.

278253140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

278253140 is an abundant number, since it is smaller than the sum of its proper divisors (359200012).

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

278253140 is a wasteful number, since it uses less digits than its factorization.

278253140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264807 (or 1264805 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 278253140 is about 16680.9214373787. The cubic root of 278253140 is about 652.8499241192.

The spelling of 278253140 in words is "two hundred seventy-eight million, two hundred fifty-three thousand, one hundred forty".