78344575 has 6 divisors (see below), whose sum is σ = 97147304. Its totient is φ = 62675640.

The previous prime is 78344569. The next prime is 78344579. The reversal of 78344575 is 57544387.

It is not a de Polignac number, because 78344575 - 2¹⁷ = 78213503 is a prime.

It is a super-2 number, since 2×78344575² = 12275744863861250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78344579) 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 5 ways as a sum of consecutive naturals, for example, 1566867 + ... + 1566916.

Almost surely, 2^78344575 is an apocalyptic number.

78344575 is a deficient number, since it is larger than the sum of its proper divisors (18802729).

78344575 is a wasteful number, since it uses less digits than its factorization.

78344575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3133793 (or 3133788 counting only the distinct ones).

The product of its digits is 470400, while the sum is 43.

The square root of 78344575 is about 8851.2470872753. The cubic root of 78344575 is about 427.8941112114.

The spelling of 78344575 in words is "seventy-eight million, three hundred forty-four thousand, five hundred seventy-five".