78857340 has 48 divisors (see below), whose sum is σ = 230404608. Its totient is φ = 20113984.

The previous prime is 78857297. The next prime is 78857347. The reversal of 78857340 is 4375887.

It is a super-3 number, since 3×78857340³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78857292 and 78857301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78857347) 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, 27192 + ... + 29951.

It is an arithmetic number, because the mean of its divisors is an integer number (4800096).

Almost surely, 2^78857340 is an apocalyptic number.

It is an amenable number.

78857340 is an abundant number, since it is smaller than the sum of its proper divisors (151547268).

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

78857340 is a wasteful number, since it uses less digits than its factorization.

78857340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57178 (or 57176 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 42.

The square root of 78857340 is about 8880.1655389976. The cubic root of 78857340 is about 428.8256038282.

It can be divided in two parts, 78857 and 340, that added together give a palindrome (79197).

The spelling of 78857340 in words is "seventy-eight million, eight hundred fifty-seven thousand, three hundred forty".