78305375 has 8 divisors (see below), whose sum is σ = 97725264. Its totient is φ = 62644200.

The previous prime is 78305371. The next prime is 78305387. The reversal of 78305375 is 57350387.

It is a happy number.

It is not a de Polignac number, because 78305375 - 2² = 78305371 is a prime.

It is a super-2 number, since 2×78305375² = 12263463507781250, 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 (78305371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 313097 + ... + 313346.

It is an arithmetic number, because the mean of its divisors is an integer number (12215658).

Almost surely, 2^78305375 is an apocalyptic number.

78305375 is a deficient number, since it is larger than the sum of its proper divisors (19419889).

78305375 is an equidigital number, since it uses as much as digits as its factorization.

78305375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626458 (or 626448 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 38.

The square root of 78305375 is about 8849.0324329838. The cubic root of 78305375 is about 427.8227331677.

The spelling of 78305375 in words is "seventy-eight million, three hundred five thousand, three hundred seventy-five".