278140455 has 24 divisors (see below), whose sum is σ = 490286160. Its totient is φ = 145825920.

The previous prime is 278140453. The next prime is 278140459. The reversal of 278140455 is 554041872.

It is not a de Polignac number, because 278140455 - 2¹ = 278140453 is a prime.

It is a super-2 number, since 2×278140455² = 154724225415214050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278140453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49726 + ... + 55035.

It is an arithmetic number, because the mean of its divisors is an integer number (20428590).

Almost surely, 2^278140455 is an apocalyptic number.

278140455 is a deficient number, since it is larger than the sum of its proper divisors (212145705).

278140455 is a wasteful number, since it uses less digits than its factorization.

278140455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104831 (or 104828 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 36.

The square root of 278140455 is about 16677.5434342112. The cubic root of 278140455 is about 652.7617833628.

The spelling of 278140455 in words is "two hundred seventy-eight million, one hundred forty thousand, four hundred fifty-five".