78827740 has 24 divisors (see below), whose sum is σ = 165705120. Its totient is φ = 31499328.

The previous prime is 78827737. The next prime is 78827741. The reversal of 78827740 is 4772887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78827741) 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 7 ways as a sum of consecutive naturals, for example, 37641 + ... + 39679.

It is an arithmetic number, because the mean of its divisors is an integer number (6904380).

Almost surely, 2^78827740 is an apocalyptic number.

It is an amenable number.

78827740 is an abundant number, since it is smaller than the sum of its proper divisors (86877380).

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

78827740 is a wasteful number, since it uses less digits than its factorization.

78827740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3981 (or 3979 counting only the distinct ones).

The product of its (nonzero) digits is 175616, while the sum is 43.

The square root of 78827740 is about 8878.4987469729. The cubic root of 78827740 is about 428.7719422566.

The spelling of 78827740 in words is "seventy-eight million, eight hundred twenty-seven thousand, seven hundred forty".