78380000 has 60 divisors (see below), whose sum is σ = 192875760. Its totient is φ = 31344000.

The previous prime is 78379993. The next prime is 78380009. The reversal of 78380000 is 8387.

It is a super-2 number, since 2×78380000² = 12286848800000000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78380009) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 18041 + ... + 21959.

It is an arithmetic number, because the mean of its divisors is an integer number (3214596).

Almost surely, 2^78380000 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 78380000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96437880).

78380000 is an abundant number, since it is smaller than the sum of its proper divisors (114495760).

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

78380000 is an equidigital number, since it uses as much as digits as its factorization.

78380000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3949 (or 3926 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 78380000 is about 8853.2479915565. The cubic root of 78380000 is about 427.9585949989.

Adding to 78380000 its reverse (8387), we get a palindrome (78388387).

The spelling of 78380000 in words is "seventy-eight million, three hundred eighty thousand".