69939648 has 168 divisors, whose sum is σ = 213969600. Its totient is φ = 21805056.

The previous prime is 69939647. The next prime is 69939659. The reversal of 69939648 is 84693996.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 69939594 and 69939603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69939641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 885273 + ... + 885351.

Almost surely, 2^69939648 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 69939648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106984800).

69939648 is an abundant number, since it is smaller than the sum of its proper divisors (144029952).

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

69939648 is a wasteful number, since it uses less digits than its factorization.

69939648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179 (or 166 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 54.

The square root of 69939648 is about 8362.9927657508. The cubic root of 69939648 is about 412.0100541110.

It can be divided in two parts, 6993 and 9648, that added together give a square (16641 = 129²).

The spelling of 69939648 in words is "sixty-nine million, nine hundred thirty-nine thousand, six hundred forty-eight".