78783380 has 24 divisors (see below), whose sum is σ = 178172232. Its totient is φ = 29089152.

The previous prime is 78783377. The next prime is 78783413. The reversal of 78783380 is 8338787.

It can be written as a sum of positive squares in 4 ways, for example, as 4 + 78783376 = 2^2 + 8876^2 .

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 151247 + ... + 151766.

It is an arithmetic number, because the mean of its divisors is an integer number (7423843).

Almost surely, 2^78783380 is an apocalyptic number.

It is an amenable number.

78783380 is an abundant number, since it is smaller than the sum of its proper divisors (99388852).

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

78783380 is a wasteful number, since it uses less digits than its factorization.

78783380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303035 (or 303033 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 44.

The square root of 78783380 is about 8876.0002253267. Note that the first 3 decimals coincide. The cubic root of 78783380 is about 428.6914972579.

The spelling of 78783380 in words is "seventy-eight million, seven hundred eighty-three thousand, three hundred eighty".