278479080 has 192 divisors, whose sum is σ = 1020801600. Its totient is φ = 67478400.

The previous prime is 278479073. The next prime is 278479081. The reversal of 278479080 is 80974872.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (278479081) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 129615 + ... + 131745.

It is an arithmetic number, because the mean of its divisors is an integer number (5316675).

Almost surely, 2^278479080 is an apocalyptic number.

278479080 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 278479080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (510400800).

278479080 is an abundant number, since it is smaller than the sum of its proper divisors (742322520).

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

278479080 is a wasteful number, since it uses less digits than its factorization.

278479080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2173 (or 2152 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 278479080 is about 16687.6924708001. The cubic root of 278479080 is about 653.0265798142.

The spelling of 278479080 in words is "two hundred seventy-eight million, four hundred seventy-nine thousand, eighty".