78765552 has 60 divisors (see below), whose sum is σ = 222746160. Its totient is φ = 25979904.

The previous prime is 78765541. The next prime is 78765559. The reversal of 78765552 is 25556787.

It is a junction number, because it is equal to n+sod(n) for n = 78765498 and 78765507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78765559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11149 + ... + 16787.

It is an arithmetic number, because the mean of its divisors is an integer number (3712436).

Almost surely, 2^78765552 is an apocalyptic number.

78765552 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78765552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111373080).

78765552 is an abundant number, since it is smaller than the sum of its proper divisors (143980608).

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

78765552 is a wasteful number, since it uses less digits than its factorization.

78765552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5750 (or 5741 counting only the distinct ones).

The product of its digits is 588000, while the sum is 45.

The square root of 78765552 is about 8874.9958873230. The cubic root of 78765552 is about 428.6591584212.

The spelling of 78765552 in words is "seventy-eight million, seven hundred sixty-five thousand, five hundred fifty-two".