78838575 has 12 divisors (see below), whose sum is σ = 130346568. Its totient is φ = 42047200.

The previous prime is 78838567. The next prime is 78838577. The reversal of 78838575 is 57583887.

It is not a de Polignac number, because 78838575 - 2³ = 78838567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78838577) 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, 525516 + ... + 525665.

It is an arithmetic number, because the mean of its divisors is an integer number (10862214).

Almost surely, 2^78838575 is an apocalyptic number.

78838575 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

78838575 is a deficient number, since it is larger than the sum of its proper divisors (51507993).

78838575 is a wasteful number, since it uses less digits than its factorization.

78838575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051194 (or 1051189 counting only the distinct ones).

The product of its digits is 1881600, while the sum is 51.

The square root of 78838575 is about 8879.1089079930. The cubic root of 78838575 is about 428.7915864883.

The spelling of 78838575 in words is "seventy-eight million, eight hundred thirty-eight thousand, five hundred seventy-five".