78771456 has 108 divisors (see below), whose sum is σ = 229582080. Its totient is φ = 25973760.

The previous prime is 78771443. The next prime is 78771457. The reversal of 78771456 is 65417787.

Its product of digits (329280) is a multiple of the sum of its prime factors (392).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78771457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 412321 + ... + 412511.

It is an arithmetic number, because the mean of its divisors is an integer number (2125760).

Almost surely, 2^78771456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78771456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114791040).

78771456 is an abundant number, since it is smaller than the sum of its proper divisors (150810624).

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

78771456 is a wasteful number, since it uses less digits than its factorization.

78771456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392 (or 375 counting only the distinct ones).

The product of its digits is 329280, while the sum is 45.

The square root of 78771456 is about 8875.3285009627. The cubic root of 78771456 is about 428.6698684349.

The spelling of 78771456 in words is "seventy-eight million, seven hundred seventy-one thousand, four hundred fifty-six".