78415132 has 6 divisors (see below), whose sum is σ = 137226488. Its totient is φ = 39207564.

The previous prime is 78415123. The next prime is 78415133. The reversal of 78415132 is 23151487.

It is a super-2 number, since 2×78415132² = 12297865853154848, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78415094 and 78415103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78415133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9801888 + ... + 9801895.

Almost surely, 2^78415132 is an apocalyptic number.

It is an amenable number.

78415132 is a deficient number, since it is larger than the sum of its proper divisors (58811356).

78415132 is a wasteful number, since it uses less digits than its factorization.

78415132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19603787 (or 19603785 counting only the distinct ones).

The product of its digits is 6720, while the sum is 31.

The square root of 78415132 is about 8855.2318998432. The cubic root of 78415132 is about 428.0225262549.

The spelling of 78415132 in words is "seventy-eight million, four hundred fifteen thousand, one hundred thirty-two".