78345575 has 24 divisors (see below), whose sum is σ = 121123200. Its totient is φ = 48837600.

The previous prime is 78345557. The next prime is 78345581. The reversal of 78345575 is 57554387.

It is a happy number.

It is not a de Polignac number, because 78345575 - 2¹² = 78341479 is a prime.

It is a super-2 number, since 2×78345575² = 12276058244161250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18425 + ... + 22274.

It is an arithmetic number, because the mean of its divisors is an integer number (5046800).

Almost surely, 2^78345575 is an apocalyptic number.

78345575 is a deficient number, since it is larger than the sum of its proper divisors (42777625).

78345575 is a wasteful number, since it uses less digits than its factorization.

78345575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40727 (or 40722 counting only the distinct ones).

The product of its digits is 588000, while the sum is 44.

The square root of 78345575 is about 8851.3035763101. The cubic root of 78345575 is about 427.8959317683.

The spelling of 78345575 in words is "seventy-eight million, three hundred forty-five thousand, five hundred seventy-five".