78158132 has 24 divisors (see below), whose sum is σ = 152380200. Its totient is φ = 34828416.

The previous prime is 78158111. The next prime is 78158159. The reversal of 78158132 is 23185187.

It can be written as a sum of positive squares in 4 ways, for example, as 1175056 + 76983076 = 1084^2 + 8774^2 .

It is a super-2 number, since 2×78158132² = 12217387195458848, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78158092 and 78158101.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 24407 + ... + 27422.

It is an arithmetic number, because the mean of its divisors is an integer number (6349175).

Almost surely, 2^78158132 is an apocalyptic number.

It is an amenable number.

78158132 is a deficient number, since it is larger than the sum of its proper divisors (74222068).

78158132 is a wasteful number, since it uses less digits than its factorization.

78158132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51875 (or 51873 counting only the distinct ones).

The product of its digits is 13440, while the sum is 35.

The square root of 78158132 is about 8840.7087951137. The cubic root of 78158132 is about 427.5544100463.

The spelling of 78158132 in words is "seventy-eight million, one hundred fifty-eight thousand, one hundred thirty-two".