78743242 has 8 divisors (see below), whose sum is σ = 119332836. Its totient is φ = 38965632.

The previous prime is 78743227. The next prime is 78743257. The reversal of 78743242 is 24234787.

It is an interprime number because it is at equal distance from previous prime (78743227) and next prime (78743257).

It can be written as a sum of positive squares in 2 ways, for example, as 74666881 + 4076361 = 8641^2 + 2019^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202753 + ... + 203140.

Almost surely, 2^78743242 is an apocalyptic number.

78743242 is a deficient number, since it is larger than the sum of its proper divisors (40589594).

78743242 is a wasteful number, since it uses less digits than its factorization.

78743242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405992.

The product of its digits is 75264, while the sum is 37.

The square root of 78743242 is about 8873.7388963165. The cubic root of 78743242 is about 428.6186826520.

The spelling of 78743242 in words is "seventy-eight million, seven hundred forty-three thousand, two hundred forty-two".