78888884 has 12 divisors (see below), whose sum is σ = 141787044. Its totient is φ = 38378304.

The previous prime is 78888871. The next prime is 78888911. The reversal of 78888884 is 48888887.

It can be written as a sum of positive squares in 2 ways, for example, as 32947600 + 45941284 = 5740^2 + 6778^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266369 + ... + 266664.

It is an arithmetic number, because the mean of its divisors is an integer number (11815587).

Almost surely, 2^78888884 is an apocalyptic number.

78888884 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is an amenable number.

78888884 is a deficient number, since it is larger than the sum of its proper divisors (62898160).

78888884 is a wasteful number, since it uses less digits than its factorization.

78888884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533074 (or 533072 counting only the distinct ones).

The product of its digits is 7340032, while the sum is 59.

The square root of 78888884 is about 8881.9414544344. The cubic root of 78888884 is about 428.8827748817.

The spelling of 78888884 in words is "seventy-eight million, eight hundred eighty-eight thousand, eight hundred eighty-four".