69778980 has 72 divisors (see below), whose sum is σ = 213700032. Its totient is φ = 18428736.

The previous prime is 69778979. The next prime is 69778993. The reversal of 69778980 is 8987796.

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 23 ways as a sum of consecutive naturals, for example, 17449 + ... + 21071.

It is an arithmetic number, because the mean of its divisors is an integer number (2968056).

Almost surely, 2^69778980 is an apocalyptic number.

69778980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 69778980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106850016).

69778980 is an abundant number, since it is smaller than the sum of its proper divisors (143921052).

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

69778980 is a wasteful number, since it uses less digits than its factorization.

69778980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3745 (or 3740 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 54.

The square root of 69778980 is about 8353.3813512852. The cubic root of 69778980 is about 411.6943171959.

The spelling of 69778980 in words is "sixty-nine million, seven hundred seventy-eight thousand, nine hundred eighty".