78098880 has 56 divisors (see below), whose sum is σ = 247966992. Its totient is φ = 20826112.

The previous prime is 78098851. The next prime is 78098887. The reversal of 78098880 is 8889087.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78098887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39717 + ... + 41636.

It is an arithmetic number, because the mean of its divisors is an integer number (4427982).

Almost surely, 2^78098880 is an apocalyptic number.

It is an amenable number.

78098880 is an abundant number, since it is smaller than the sum of its proper divisors (169868112).

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

78098880 is a wasteful number, since it uses less digits than its factorization.

78098880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81373 (or 81363 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 48.

The square root of 78098880 is about 8837.3570709800. The cubic root of 78098880 is about 427.4463391488.

The spelling of 78098880 in words is "seventy-eight million, ninety-eight thousand, eight hundred eighty".