78730880 has 32 divisors (see below), whose sum is σ = 188217540. Its totient is φ = 31492096.

The previous prime is 78730867. The next prime is 78730907. The reversal of 78730880 is 8803787.

It can be written as a sum of positive squares in 2 ways, for example, as 78712384 + 18496 = 8872^2 + 136^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60869 + ... + 62148.

Almost surely, 2^78730880 is an apocalyptic number.

It is an amenable number.

78730880 is an abundant number, since it is smaller than the sum of its proper divisors (109486660).

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

78730880 is a wasteful number, since it uses less digits than its factorization.

78730880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123036 (or 123024 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 78730880 is about 8873.0423192950. The cubic root of 78730880 is about 428.5962516839.

The spelling of 78730880 in words is "seventy-eight million, seven hundred thirty thousand, eight hundred eighty".