78934380 has 96 divisors (see below), whose sum is σ = 254360064. Its totient is φ = 17915904.

The previous prime is 78934363. The next prime is 78934381. The reversal of 78934380 is 8343987.

78934380 is nontrivially palindromic in base 8.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (78934381) 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 31 ways as a sum of consecutive naturals, for example, 67884 + ... + 69036.

It is an arithmetic number, because the mean of its divisors is an integer number (2649584).

Almost surely, 2^78934380 is an apocalyptic number.

78934380 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78934380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127180032).

78934380 is an abundant number, since it is smaller than the sum of its proper divisors (175425684).

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

78934380 is a wasteful number, since it uses less digits than its factorization.

78934380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1335 (or 1333 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 78934380 is about 8884.5022370418. The cubic root of 78934380 is about 428.9652060175.

The spelling of 78934380 in words is "seventy-eight million, nine hundred thirty-four thousand, three hundred eighty".