78841530 has 24 divisors (see below), whose sum is σ = 204988212. Its totient is φ = 21024384.

The previous prime is 78841519. The next prime is 78841531. The reversal of 78841530 is 3514887.

78841530 is a `hidden beast` number, since 7 + 88 + 41 + 530 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 78801129 + 40401 = 8877^2 + 201^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78841531) 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 11 ways as a sum of consecutive naturals, for example, 437919 + ... + 438098.

Almost surely, 2^78841530 is an apocalyptic number.

78841530 is an abundant number, since it is smaller than the sum of its proper divisors (126146682).

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

78841530 is a wasteful number, since it uses less digits than its factorization.

78841530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876030 (or 876027 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 78841530 is about 8879.2753082670. The cubic root of 78841530 is about 428.7969436936.

The spelling of 78841530 in words is "seventy-eight million, eight hundred forty-one thousand, five hundred thirty".