78768828 has 48 divisors (see below), whose sum is σ = 205030560. Its totient is φ = 26151552.

The previous prime is 78768821. The next prime is 78768853. The reversal of 78768828 is 82886787.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78768821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28600 + ... + 31232.

It is an arithmetic number, because the mean of its divisors is an integer number (4271470).

Almost surely, 2^78768828 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 78768828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102515280).

78768828 is an abundant number, since it is smaller than the sum of its proper divisors (126261732).

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

78768828 is a wasteful number, since it uses less digits than its factorization.

78768828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2923 (or 2915 counting only the distinct ones).

The product of its digits is 2408448, while the sum is 54.

The square root of 78768828 is about 8875.1804488698. The cubic root of 78768828 is about 428.6651012388.

The spelling of 78768828 in words is "seventy-eight million, seven hundred sixty-eight thousand, eight hundred twenty-eight".