78748900 has 18 divisors (see below), whose sum is σ = 170885330. Its totient is φ = 31499520.

The previous prime is 78748889. The next prime is 78748907. The reversal of 78748900 is 984787.

It can be written as a sum of positive squares in 3 ways, for example, as 1024 + 78747876 = 32^2 + 8874^2 .

It is not an unprimeable number, because it can be changed into a prime (78748907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 393645 + ... + 393844.

Almost surely, 2^78748900 is an apocalyptic number.

It is an amenable number.

78748900 is an abundant number, since it is smaller than the sum of its proper divisors (92136430).

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

78748900 is a wasteful number, since it uses less digits than its factorization.

78748900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787503 (or 787496 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 78748900 is about 8874.0576964543. The cubic root of 78748900 is about 428.6289483644.

The spelling of 78748900 in words is "seventy-eight million, seven hundred forty-eight thousand, nine hundred".