78730380 has 120 divisors (see below), whose sum is σ = 257840352. Its totient is φ = 20072448.

The previous prime is 78730363. The next prime is 78730381. The reversal of 78730380 is 8303787.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (78730381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 36204 + ... + 38316.

Almost surely, 2^78730380 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 78730380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128920176).

78730380 is an abundant number, since it is smaller than the sum of its proper divisors (179109972).

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

78730380 is a wasteful number, since it uses less digits than its factorization.

78730380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2157 (or 2146 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 78730380 is about 8873.0141440212. The cubic root of 78730380 is about 428.5953443797.

The spelling of 78730380 in words is "seventy-eight million, seven hundred thirty thousand, three hundred eighty".