78380988 has 96 divisors (see below), whose sum is σ = 216384000. Its totient is φ = 22071168.

The previous prime is 78380977. The next prime is 78381001. The reversal of 78380988 is 88908387.

It is a super-2 number, since 2×78380988² = 12287158559712288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78380988.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 563823 + ... + 563961.

It is an arithmetic number, because the mean of its divisors is an integer number (2254000).

Almost surely, 2^78380988 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 78380988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108192000).

78380988 is an abundant number, since it is smaller than the sum of its proper divisors (138003012).

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

78380988 is a wasteful number, since it uses less digits than its factorization.

78380988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 51.

The square root of 78380988 is about 8853.3037901114. The cubic root of 78380988 is about 427.9603931673.

The spelling of 78380988 in words is "seventy-eight million, three hundred eighty thousand, nine hundred eighty-eight".