78041380 has 24 divisors (see below), whose sum is σ = 166135032. Its totient is φ = 30788352.

The previous prime is 78041377. The next prime is 78041389. The reversal of 78041380 is 8314087.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12334144 + 65707236 = 3512^2 + 8106^2 .

It is not an unprimeable number, because it can be changed into a prime (78041389) 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 7 ways as a sum of consecutive naturals, for example, 25267 + ... + 28186.

It is an arithmetic number, because the mean of its divisors is an integer number (6922293).

Almost surely, 2^78041380 is an apocalyptic number.

It is an amenable number.

78041380 is an abundant number, since it is smaller than the sum of its proper divisors (88093652).

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

78041380 is a wasteful number, since it uses less digits than its factorization.

78041380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53535 (or 53533 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 78041380 is about 8834.1032368883. The cubic root of 78041380 is about 427.3414114861.

The spelling of 78041380 in words is "seventy-eight million, forty-one thousand, three hundred eighty".