78875420 has 24 divisors (see below), whose sum is σ = 178380384. Its totient is φ = 29123136.

The previous prime is 78875413. The next prime is 78875437. The reversal of 78875420 is 2457887.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 151424 + ... + 151943.

It is an arithmetic number, because the mean of its divisors is an integer number (7432516).

Almost surely, 2^78875420 is an apocalyptic number.

It is an amenable number.

78875420 is an abundant number, since it is smaller than the sum of its proper divisors (99504964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78875420 is a wasteful number, since it uses less digits than its factorization.

78875420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303389 (or 303387 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 41.

The square root of 78875420 is about 8881.1834796946. The cubic root of 78875420 is about 428.8583742905.

The spelling of 78875420 in words is "seventy-eight million, eight hundred seventy-five thousand, four hundred twenty".