78243932 has 12 divisors (see below), whose sum is σ = 147459816. Its totient is φ = 36112560.

The previous prime is 78243931. The next prime is 78243959. The reversal of 78243932 is 23934287.

It is a happy number.

It is a super-2 number, since 2×78243932² = 12244225789641248, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78243931) by changing a digit.

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, 752294 + ... + 752397.

It is an arithmetic number, because the mean of its divisors is an integer number (12288318).

Almost surely, 2^78243932 is an apocalyptic number.

It is an amenable number.

78243932 is a deficient number, since it is larger than the sum of its proper divisors (69215884).

78243932 is a wasteful number, since it uses less digits than its factorization.

78243932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1504708 (or 1504706 counting only the distinct ones).

The product of its digits is 72576, while the sum is 38.

The square root of 78243932 is about 8845.5600161889. The cubic root of 78243932 is about 427.7108055997.

The spelling of 78243932 in words is "seventy-eight million, two hundred forty-three thousand, nine hundred thirty-two".