78432243 has 4 divisors (see below), whose sum is σ = 104576328. Its totient is φ = 52288160.

The previous prime is 78432239. The next prime is 78432253. The reversal of 78432243 is 34223487.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34223487 = 3 ⋅11407829.

It is a cyclic number.

It is not a de Polignac number, because 78432243 - 2² = 78432239 is a prime.

It is a super-2 number, since 2×78432243² = 12303233484022098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78432223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13072038 + ... + 13072043.

It is an arithmetic number, because the mean of its divisors is an integer number (26144082).

Almost surely, 2^78432243 is an apocalyptic number.

78432243 is a deficient number, since it is larger than the sum of its proper divisors (26144085).

78432243 is a wasteful number, since it uses less digits than its factorization.

78432243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26144084.

The product of its digits is 32256, while the sum is 33.

The square root of 78432243 is about 8856.1979991416. The cubic root of 78432243 is about 428.0536569844.

The spelling of 78432243 in words is "seventy-eight million, four hundred thirty-two thousand, two hundred forty-three".