78672436 has 24 divisors (see below), whose sum is σ = 139539456. Its totient is φ = 38808000.

The previous prime is 78672431. The next prime is 78672437. The reversal of 78672436 is 63427687.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 78672392 and 78672401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78672431) 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 in 7 ways as a sum of consecutive naturals, for example, 127200 + ... + 127816.

It is an arithmetic number, because the mean of its divisors is an integer number (5814144).

Almost surely, 2^78672436 is an apocalyptic number.

It is an amenable number.

78672436 is a deficient number, since it is larger than the sum of its proper divisors (60867020).

78672436 is a wasteful number, since it uses less digits than its factorization.

78672436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999 (or 997 counting only the distinct ones).

The product of its digits is 338688, while the sum is 43.

The square root of 78672436 is about 8869.7483617068. The cubic root of 78672436 is about 428.4901726797.

The spelling of 78672436 in words is "seventy-eight million, six hundred seventy-two thousand, four hundred thirty-six".