78245380 has 48 divisors (see below), whose sum is σ = 172751040. Its totient is φ = 29731968.

The previous prime is 78245369. The next prime is 78245389. The reversal of 78245380 is 8354287.

It is a super-2 number, since 2×78245380² = 12244678982688800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (78245389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30591 + ... + 33049.

It is an arithmetic number, because the mean of its divisors is an integer number (3598980).

Almost surely, 2^78245380 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 78245380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86375520).

78245380 is an abundant number, since it is smaller than the sum of its proper divisors (94505660).

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

78245380 is a wasteful number, since it uses less digits than its factorization.

78245380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2548 (or 2546 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 78245380 is about 8845.6418647829. The cubic root of 78245380 is about 427.7134440212.

The spelling of 78245380 in words is "seventy-eight million, two hundred forty-five thousand, three hundred eighty".