69990912 has 160 divisors (see below), whose sum is σ = 213111360. Its totient is φ = 22671360.

The previous prime is 69990881. The next prime is 69990913. The reversal of 69990912 is 21909996.

It is a happy number.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (69990913) 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, 843223 + ... + 843305.

It is an arithmetic number, because the mean of its divisors is an integer number (1331946).

Almost surely, 2^69990912 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 69990912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106555680).

69990912 is an abundant number, since it is smaller than the sum of its proper divisors (143120448).

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

69990912 is an equidigital number, since it uses as much as digits as its factorization.

69990912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 78732, while the sum is 45.

The square root of 69990912 is about 8366.0571358317. The cubic root of 69990912 is about 412.1106938562.

The spelling of 69990912 in words is "sixty-nine million, nine hundred ninety thousand, nine hundred twelve".