78242344 has 16 divisors (see below), whose sum is σ = 147777300. Its totient is φ = 38835072.

The previous prime is 78242341. The next prime is 78242371. The reversal of 78242344 is 44324287.

It can be written as a sum of positive squares in 2 ways, for example, as 66422500 + 11819844 = 8150^2 + 3438^2 .

It is a super-2 number, since 2×78242344² = 12243728789228672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78242341) 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 3 ways as a sum of consecutive naturals, for example, 34599 + ... + 36790.

Almost surely, 2^78242344 is an apocalyptic number.

It is an amenable number.

78242344 is a deficient number, since it is larger than the sum of its proper divisors (69534956).

78242344 is a wasteful number, since it uses less digits than its factorization.

78242344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71532 (or 71528 counting only the distinct ones).

The product of its digits is 43008, while the sum is 34.

The square root of 78242344 is about 8845.4702531861. The cubic root of 78242344 is about 427.7079120447.

The spelling of 78242344 in words is "seventy-eight million, two hundred forty-two thousand, three hundred forty-four".