7278546880 has 224 divisors, whose sum is σ = 19919582208. Its totient is φ = 2528261120.

The previous prime is 7278546773. The next prime is 7278546881. The reversal of 7278546880 is 886458727.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7278546881) 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, 9795789 + ... + 9796531.

Almost surely, 2^7278546880 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 7278546880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9959791104).

7278546880 is an abundant number, since it is smaller than the sum of its proper divisors (12641035328).

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

7278546880 is a wasteful number, since it uses less digits than its factorization.

7278546880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816 (or 784 counting only the distinct ones).

The product of its (nonzero) digits is 6021120, while the sum is 55.

The square root of 7278546880 is about 85314.4001912924. The cubic root of 7278546880 is about 1937.9752567324.

The spelling of 7278546880 in words is "seven billion, two hundred seventy-eight million, five hundred forty-six thousand, eight hundred eighty".