7297778880 has 168 divisors, whose sum is σ = 28687300512. Its totient is φ = 1668059136.

The previous prime is 7297778867. The next prime is 7297778881. The reversal of 7297778880 is 888777927.

It is a tau number, because it is divible by the number of its divisors (168).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (7297778881) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 160837 + ... + 201156.

Almost surely, 2^7297778880 is an apocalyptic number.

7297778880 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7297778880 is an abundant number, since it is smaller than the sum of its proper divisors (21389521632).

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

7297778880 is a wasteful number, since it uses less digits than its factorization.

7297778880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362023 (or 362010 counting only the distinct ones).

The product of its (nonzero) digits is 22127616, while the sum is 63.

The square root of 7297778880 is about 85427.0383426699. The cubic root of 7297778880 is about 1939.6806503068.

The spelling of 7297778880 in words is "seven billion, two hundred ninety-seven million, seven hundred seventy-eight thousand, eight hundred eighty".