69998320 has 80 divisors (see below), whose sum is σ = 187130880. Its totient is φ = 23853312.

The previous prime is 69998309. The next prime is 69998323. The reversal of 69998320 is 2389996.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69998323) 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, 133579 + ... + 134101.

It is an arithmetic number, because the mean of its divisors is an integer number (2339136).

Almost surely, 2^69998320 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 69998320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93565440).

69998320 is an abundant number, since it is smaller than the sum of its proper divisors (117132560).

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

69998320 is a wasteful number, since it uses less digits than its factorization.

69998320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782 (or 776 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 69998320 is about 8366.4998655352. The cubic root of 69998320 is about 412.1252329262.

The spelling of 69998320 in words is "sixty-nine million, nine hundred ninety-eight thousand, three hundred twenty".