278148 has 24 divisors (see below), whose sum is σ = 699328. Its totient is φ = 85536.

The previous prime is 278147. The next prime is 278149. The reversal of 278148 is 841872.

It is an interprime number because it is at equal distance from previous prime (278147) and next prime (278149).

It is a super-3 number, since 3×278148³ = 64557853101533376, which contains 333 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 278148.

It is not an unprimeable number, because it can be changed into a prime (278143) 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, 736 + ... + 1047.

2²⁷⁸¹⁴⁸ is an apocalyptic number.

It is an amenable number.

278148 is an abundant number, since it is smaller than the sum of its proper divisors (421180).

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

278148 is a wasteful number, since it uses less digits than its factorization.

278148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1803 (or 1801 counting only the distinct ones).

The product of its digits is 3584, while the sum is 30.

The square root of 278148 is about 527.3973833837. The cubic root of 278148 is about 65.2767685708.

The spelling of 278148 in words is "two hundred seventy-eight thousand, one hundred forty-eight".