78733788 has 72 divisors (see below), whose sum is σ = 214904592. Its totient is φ = 22369536.

The previous prime is 78733757. The next prime is 78733793. The reversal of 78733788 is 88733787.

78733788 = T₁₉₇ + T₁₉₈ + ... + T₇₈₂.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 78733788.

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 23 ways as a sum of consecutive naturals, for example, 172056 + ... + 172512.

It is an arithmetic number, because the mean of its divisors is an integer number (2984786).

Almost surely, 2^78733788 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 78733788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107452296).

78733788 is an abundant number, since it is smaller than the sum of its proper divisors (136170804).

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

78733788 is a wasteful number, since it uses less digits than its factorization.

78733788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771 (or 762 counting only the distinct ones).

The product of its digits is 1580544, while the sum is 51.

The square root of 78733788 is about 8873.2061849142. The cubic root of 78733788 is about 428.6015284891.

Subtracting 78733788 from its reverse (88733787), we obtain a palindrome (9999999).

It can be divided in two parts, 78 and 733788, that added together give a triangular number (733866 = T₁₂₁₁).

The spelling of 78733788 in words is "seventy-eight million, seven hundred thirty-three thousand, seven hundred eighty-eight".