78143375 has 24 divisors (see below), whose sum is σ = 99994128. Its totient is φ = 60968400.

The previous prime is 78143369. The next prime is 78143383. The reversal of 78143375 is 57334187.

It is not a de Polignac number, because 78143375 - 2⁸ = 78143119 is a prime.

It is a super-2 number, since 2×78143375² = 12212774112781250, which contains 22 as substring.

It is a Duffinian number.

Its product of digits (70560) is a multiple of the sum of its prime factors (392).

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, 275984 + ... + 276266.

It is an arithmetic number, because the mean of its divisors is an integer number (4166422).

Almost surely, 2^78143375 is an apocalyptic number.

78143375 is a deficient number, since it is larger than the sum of its proper divisors (21850753).

78143375 is an equidigital number, since it uses as much as digits as its factorization.

78143375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392 (or 335 counting only the distinct ones).

The product of its digits is 70560, while the sum is 38.

The square root of 78143375 is about 8839.8741506879. The cubic root of 78143375 is about 427.5274995705.

The spelling of 78143375 in words is "seventy-eight million, one hundred forty-three thousand, three hundred seventy-five".