78433542 has 64 divisors (see below), whose sum is σ = 198443520. Its totient is φ = 22730400.

The previous prime is 78433541. The next prime is 78433543. The reversal of 78433542 is 24533487.

It is a happy number.

78433542 is a `hidden beast` number, since 7 + 84 + 33 + 542 = 666.

It is an interprime number because it is at equal distance from previous prime (78433541) and next prime (78433543).

It is a junction number, because it is equal to n+sod(n) for n = 78433497 and 78433506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78433541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10792 + ... + 16532.

It is an arithmetic number, because the mean of its divisors is an integer number (3100680).

Almost surely, 2^78433542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78433542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99221760).

78433542 is an abundant number, since it is smaller than the sum of its proper divisors (120009978).

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

78433542 is a wasteful number, since it uses less digits than its factorization.

78433542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5786 (or 5780 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 78433542 is about 8856.2713373067. The cubic root of 78433542 is about 428.0560201224.

The spelling of 78433542 in words is "seventy-eight million, four hundred thirty-three thousand, five hundred forty-two".