78740142 has 96 divisors (see below), whose sum is σ = 185166720. Its totient is φ = 22239360.

The previous prime is 78740111. The next prime is 78740147. The reversal of 78740142 is 24104787.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78740147) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1175193 + ... + 1175259.

It is an arithmetic number, because the mean of its divisors is an integer number (1928820).

Almost surely, 2^78740142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78740142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92583360).

78740142 is an abundant number, since it is smaller than the sum of its proper divisors (106426578).

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

78740142 is a wasteful number, since it uses less digits than its factorization.

78740142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 33.

The square root of 78740142 is about 8873.5642218896. The cubic root of 78740142 is about 428.6130578927.

The spelling of 78740142 in words is "seventy-eight million, seven hundred forty thousand, one hundred forty-two".