69780828 has 48 divisors (see below), whose sum is σ = 178245536. Its totient is φ = 21116160.

The previous prime is 69780803. The next prime is 69780829. The reversal of 69780828 is 82808796.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69780829) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 5850 + ... + 13182.

Almost surely, 2^69780828 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 69780828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89122768).

69780828 is an abundant number, since it is smaller than the sum of its proper divisors (108464708).

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

69780828 is a wasteful number, since it uses less digits than its factorization.

69780828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7414 (or 7412 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 48.

The square root of 69780828 is about 8353.4919644422. The cubic root of 69780828 is about 411.6979515491.

The spelling of 69780828 in words is "sixty-nine million, seven hundred eighty thousand, eight hundred twenty-eight".