278725482 has 64 divisors (see below), whose sum is σ = 709632000. Its totient is φ = 79438320.

The previous prime is 278725471. The next prime is 278725487. The reversal of 278725482 is 284527872.

278725482 is a `hidden beast` number, since 27 + 87 + 2 + 548 + 2 = 666.

It is a super-2 number, since 2×278725482² = 155375788632264648, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (278725487) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 225807 + ... + 227037.

It is an arithmetic number, because the mean of its divisors is an integer number (11088000).

Almost surely, 2^278725482 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 278725482, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (354816000).

278725482 is an abundant number, since it is smaller than the sum of its proper divisors (430906518).

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

278725482 is a wasteful number, since it uses less digits than its factorization.

278725482 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1848 (or 1842 counting only the distinct ones).

The product of its digits is 501760, while the sum is 45.

The square root of 278725482 is about 16695.0735847435. The cubic root of 278725482 is about 653.2191252423.

The spelling of 278725482 in words is "two hundred seventy-eight million, seven hundred twenty-five thousand, four hundred eighty-two".