78442975 has 12 divisors (see below), whose sum is σ = 104751976. Its totient is φ = 57926880.

The previous prime is 78442967. The next prime is 78442979. The reversal of 78442975 is 57924487.

It is not a de Polignac number, because 78442975 - 2³ = 78442967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78442979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120357 + ... + 121006.

Almost surely, 2^78442975 is an apocalyptic number.

78442975 is a deficient number, since it is larger than the sum of its proper divisors (26309001).

78442975 is a wasteful number, since it uses less digits than its factorization.

78442975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241386 (or 241381 counting only the distinct ones).

The product of its digits is 564480, while the sum is 46.

The square root of 78442975 is about 8856.8038817623. The cubic root of 78442975 is about 428.0731798327.

The spelling of 78442975 in words is "seventy-eight million, four hundred forty-two thousand, nine hundred seventy-five".