69538920 has 128 divisors (see below), whose sum is σ = 229824000. Its totient is φ = 16692480.

The previous prime is 69538901. The next prime is 69538927. The reversal of 69538920 is 2983596.

It is a Cunningham number, because it is equal to 8339²-1.

It is a super-2 number, since 2×69538920² = 9671322789532800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (69538927) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 183291 + ... + 183669.

It is an arithmetic number, because the mean of its divisors is an integer number (1795500).

Almost surely, 2^69538920 is an apocalyptic number.

69538920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 69538920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114912000).

69538920 is an abundant number, since it is smaller than the sum of its proper divisors (160285080).

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

69538920 is a wasteful number, since it uses less digits than its factorization.

69538920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543 (or 539 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 69538920 is about 8338.9999400408. Note that the first 4 decimals coincide. The cubic root of 69538920 is about 411.2216586623.

The spelling of 69538920 in words is "sixty-nine million, five hundred thirty-eight thousand, nine hundred twenty".