7278353280 has 576 divisors, whose sum is σ = 28822323600. Its totient is φ = 1734543360.

The previous prime is 7278353273. The next prime is 7278353297. The reversal of 7278353280 is 823538727.

7278353280 is a `hidden beast` number, since 7 + 278 + 353 + 28 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 123361891 + ... + 123361949.

Almost surely, 2^7278353280 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7278353280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14411161800).

7278353280 is an abundant number, since it is smaller than the sum of its proper divisors (21543970320).

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

7278353280 is a wasteful number, since it uses less digits than its factorization.

7278353280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 80 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The square root of 7278353280 is about 85313.2655570047. The cubic root of 7278353280 is about 1937.9580740290.

The spelling of 7278353280 in words is "seven billion, two hundred seventy-eight million, three hundred fifty-three thousand, two hundred eighty".