69726816 has 72 divisors (see below), whose sum is σ = 199311840. Its totient is φ = 23122176.

The previous prime is 69726793. The next prime is 69726821. The reversal of 69726816 is 61862796.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68326 + ... + 69338.

It is an arithmetic number, because the mean of its divisors is an integer number (2768220).

Almost surely, 2^69726816 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 69726816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99655920).

69726816 is an abundant number, since it is smaller than the sum of its proper divisors (129585024).

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

69726816 is a wasteful number, since it uses less digits than its factorization.

69726816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1268 (or 1257 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 69726816 is about 8350.2584391143. The cubic root of 69726816 is about 411.5917028363.

The spelling of 69726816 in words is "sixty-nine million, seven hundred twenty-six thousand, eight hundred sixteen".