78143142 has 96 divisors (see below), whose sum is σ = 201654144. Its totient is φ = 19958400.

The previous prime is 78143137. The next prime is 78143189. The reversal of 78143142 is 24134187.

It is a super-2 number, since 2×78143142² = 12212701283264328, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 235917 + ... + 236247.

It is an arithmetic number, because the mean of its divisors is an integer number (2100564).

Almost surely, 2^78143142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78143142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100827072).

78143142 is an abundant number, since it is smaller than the sum of its proper divisors (123511002).

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

78143142 is a wasteful number, since it uses less digits than its factorization.

78143142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434 (or 427 counting only the distinct ones).

The product of its digits is 5376, while the sum is 30.

The square root of 78143142 is about 8839.8609717574. The cubic root of 78143142 is about 427.5270746506.

The spelling of 78143142 in words is "seventy-eight million, one hundred forty-three thousand, one hundred forty-two".