69942816 has 72 divisors (see below), whose sum is σ = 207567360. Its totient is φ = 22298496.

The previous prime is 69942791. The next prime is 69942823. The reversal of 69942816 is 61824996.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is a nude number because it is divisible by every one of its digits.

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 11 ways as a sum of consecutive naturals, for example, 1345 + ... + 11903.

It is an arithmetic number, because the mean of its divisors is an integer number (2882880).

Almost surely, 2^69942816 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 69942816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103783680).

69942816 is an abundant number, since it is smaller than the sum of its proper divisors (137624544).

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

69942816 is a wasteful number, since it uses less digits than its factorization.

69942816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10598 (or 10587 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 69942816 is about 8363.1821694855. The cubic root of 69942816 is about 412.0162748465.

The spelling of 69942816 in words is "sixty-nine million, nine hundred forty-two thousand, eight hundred sixteen".