78897375 has 64 divisors (see below), whose sum is σ = 147987840. Its totient is φ = 41472000.

The previous prime is 78897359. The next prime is 78897397. The reversal of 78897375 is 57379887.

It is not a de Polignac number, because 78897375 - 2⁴ = 78897359 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 327255 + ... + 327495.

It is an arithmetic number, because the mean of its divisors is an integer number (2312310).

Almost surely, 2^78897375 is an apocalyptic number.

78897375 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

78897375 is a deficient number, since it is larger than the sum of its proper divisors (69090465).

78897375 is a wasteful number, since it uses less digits than its factorization.

78897375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362 (or 346 counting only the distinct ones).

The product of its digits is 2963520, while the sum is 54.

The square root of 78897375 is about 8882.4194339155. The cubic root of 78897375 is about 428.8981615573.

The spelling of 78897375 in words is "seventy-eight million, eight hundred ninety-seven thousand, three hundred seventy-five".