278483480 has 128 divisors (see below), whose sum is σ = 718502400. Its totient is φ = 96230400.

The previous prime is 278483479. The next prime is 278483489. The reversal of 278483480 is 84384872.

278483480 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278483489) 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, 775541 + ... + 775899.

It is an arithmetic number, because the mean of its divisors is an integer number (5613300).

Almost surely, 2^278483480 is an apocalyptic number.

278483480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 278483480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (359251200).

278483480 is an abundant number, since it is smaller than the sum of its proper divisors (440018920).

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

278483480 is a wasteful number, since it uses less digits than its factorization.

278483480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465 (or 461 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 44.

The square root of 278483480 is about 16687.8243039649. The cubic root of 278483480 is about 653.0300190933.

The spelling of 278483480 in words is "two hundred seventy-eight million, four hundred eighty-three thousand, four hundred eighty".