78840126 has 24 divisors (see below), whose sum is σ = 171138864. Its totient is φ = 26231040.

The previous prime is 78840109. The next prime is 78840127. The reversal of 78840126 is 62104887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78840127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6591 + ... + 14181.

It is an arithmetic number, because the mean of its divisors is an integer number (7130786).

Almost surely, 2^78840126 is an apocalyptic number.

78840126 is an abundant number, since it is smaller than the sum of its proper divisors (92298738).

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

78840126 is a wasteful number, since it uses less digits than its factorization.

78840126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8176 (or 8173 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 78840126 is about 8879.1962474089. The cubic root of 78840126 is about 428.7943983579.

The spelling of 78840126 in words is "seventy-eight million, eight hundred forty thousand, one hundred twenty-six".