78140975 has 12 divisors (see below), whose sum is σ = 105703800. Its totient is φ = 56829600.

The previous prime is 78140971. The next prime is 78140981. The reversal of 78140975 is 57904187.

It is not a de Polignac number, because 78140975 - 2² = 78140971 is a prime.

It is a super-2 number, since 2×78140975² = 12212023947901250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78140971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 141800 + ... + 142349.

It is an arithmetic number, because the mean of its divisors is an integer number (8808650).

Almost surely, 2^78140975 is an apocalyptic number.

78140975 is a deficient number, since it is larger than the sum of its proper divisors (27562825).

78140975 is a wasteful number, since it uses less digits than its factorization.

78140975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284170 (or 284165 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 78140975 is about 8839.7384011067. The cubic root of 78140975 is about 427.5231226735.

The spelling of 78140975 in words is "seventy-eight million, one hundred forty thousand, nine hundred seventy-five".