278488 has 16 divisors (see below), whose sum is σ = 596880. Its totient is φ = 119328.

The previous prime is 278479. The next prime is 278489. The reversal of 278488 is 884872.

It is a super-2 number, since 2×278488² = 155111132288, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278489) by changing a digit.

278488 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 3 ways as a sum of consecutive naturals, for example, 2431 + ... + 2542.

It is an arithmetic number, because the mean of its divisors is an integer number (37305).

2²⁷⁸⁴⁸⁸ is an apocalyptic number.

278488 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

278488 is an abundant number, since it is smaller than the sum of its proper divisors (318392).

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

278488 is a wasteful number, since it uses less digits than its factorization.

278488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4986 (or 4982 counting only the distinct ones).

The product of its digits is 28672, while the sum is 37.

The square root of 278488 is about 527.7196225270. The cubic root of 278488 is about 65.3033552133.

It can be divided in two parts, 27848 and 8, that multiplied together give a square (222784 = 472²).

The spelling of 278488 in words is "two hundred seventy-eight thousand, four hundred eighty-eight".