78132242 has 12 divisors (see below), whose sum is σ = 122517150. Its totient is φ = 37367088.

The previous prime is 78132233. The next prime is 78132269. The reversal of 78132242 is 24223187.

It can be written as a sum of positive squares in only one way, i.e., 51825601 + 26306641 = 7199^2 + 5129^2 .

It is a super-2 number, since 2×78132242² = 12209294479893128, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35867 + ... + 37982.

Almost surely, 2^78132242 is an apocalyptic number.

78132242 is a deficient number, since it is larger than the sum of its proper divisors (44384908).

78132242 is a wasteful number, since it uses less digits than its factorization.

78132242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73897 (or 73874 counting only the distinct ones).

The product of its digits is 5376, while the sum is 29.

The square root of 78132242 is about 8839.2444247232. The cubic root of 78132242 is about 427.5071954832.

The spelling of 78132242 in words is "seventy-eight million, one hundred thirty-two thousand, two hundred forty-two".