78870273 has 16 divisors (see below), whose sum is σ = 113689920. Its totient is φ = 48465216.

The previous prime is 78870269. The next prime is 78870283. The reversal of 78870273 is 37207887.

It is not a de Polignac number, because 78870273 - 2² = 78870269 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78870223) 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 15 ways as a sum of consecutive naturals, for example, 16590 + ... + 20807.

It is an arithmetic number, because the mean of its divisors is an integer number (7105620).

Almost surely, 2^78870273 is an apocalyptic number.

It is an amenable number.

78870273 is a deficient number, since it is larger than the sum of its proper divisors (34819647).

78870273 is a wasteful number, since it uses less digits than its factorization.

78870273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37456.

The product of its (nonzero) digits is 131712, while the sum is 42.

The square root of 78870273 is about 8880.8937050277. The cubic root of 78870273 is about 428.8490457313.

The spelling of 78870273 in words is "seventy-eight million, eight hundred seventy thousand, two hundred seventy-three".