69998720 has 128 divisors (see below), whose sum is σ = 186684480. Its totient is φ = 24883200.

The previous prime is 69998699. The next prime is 69998749. The reversal of 69998720 is 2789996.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 429359 + ... + 429521.

Almost surely, 2^69998720 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 69998720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93342240).

69998720 is an abundant number, since it is smaller than the sum of its proper divisors (116685760).

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

69998720 is a wasteful number, since it uses less digits than its factorization.

69998720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254 (or 242 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 69998720 is about 8366.5237703601. The cubic root of 69998720 is about 412.1260179440.

It can be divided in two parts, 699987 and 20, that added together give a palindrome (700007).

The spelling of 69998720 in words is "sixty-nine million, nine hundred ninety-eight thousand, seven hundred twenty".