69138944 has 80 divisors (see below), whose sum is σ = 160275456. Its totient is φ = 29184000.

The previous prime is 69138919. The next prime is 69138947. The reversal of 69138944 is 44983196.

It is a junction number, because it is equal to n+sod(n) for n = 69138895 and 69138904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69138947) 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 7 ways as a sum of consecutive naturals, for example, 361889 + ... + 362079.

Almost surely, 2^69138944 is an apocalyptic number.

69138944 is a gapful number since it is divisible by the number (64) 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 69138944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80137728).

69138944 is an abundant number, since it is smaller than the sum of its proper divisors (91136512).

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

69138944 is a wasteful number, since it uses less digits than its factorization.

69138944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317 (or 301 counting only the distinct ones).

The product of its digits is 186624, while the sum is 44.

The square root of 69138944 is about 8314.9831028090. The cubic root of 69138944 is about 410.4317165836.

The spelling of 69138944 in words is "sixty-nine million, one hundred thirty-eight thousand, nine hundred forty-four".