78471132 has 24 divisors (see below), whose sum is σ = 186102672. Its totient is φ = 25728000.

The previous prime is 78471119. The next prime is 78471161. The reversal of 78471132 is 23117487.

It is a happy number.

It is a super-2 number, since 2×78471132² = 12315437114722848, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78471093 and 78471102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52869 + ... + 54332.

It is an arithmetic number, because the mean of its divisors is an integer number (7754278).

Almost surely, 2^78471132 is an apocalyptic number.

It is an amenable number.

78471132 is an abundant number, since it is smaller than the sum of its proper divisors (107631540).

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

78471132 is a wasteful number, since it uses less digits than its factorization.

78471132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107269 (or 107267 counting only the distinct ones).

The product of its digits is 9408, while the sum is 33.

The square root of 78471132 is about 8858.3933080441. The cubic root of 78471132 is about 428.1243924690.

The spelling of 78471132 in words is "seventy-eight million, four hundred seventy-one thousand, one hundred thirty-two".