78425738 has 8 divisors (see below), whose sum is σ = 118127460. Its totient is φ = 39049920.

The previous prime is 78425723. The next prime is 78425741. The reversal of 78425738 is 83752487.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 72982849 + 5442889 = 8543^2 + 2333^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 80873 + ... + 81836.

Almost surely, 2^78425738 is an apocalyptic number.

78425738 is a deficient number, since it is larger than the sum of its proper divisors (39701722).

78425738 is a wasteful number, since it uses less digits than its factorization.

78425738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162952.

The product of its digits is 376320, while the sum is 44.

The square root of 78425738 is about 8855.8307346064. The cubic root of 78425738 is about 428.0418227102.

The spelling of 78425738 in words is "seventy-eight million, four hundred twenty-five thousand, seven hundred thirty-eight".