69291138 has 64 divisors (see below), whose sum is σ = 172154880. Its totient is φ = 18144000.

The previous prime is 69291067. The next prime is 69291149. The reversal of 69291138 is 83119296.

It is a junction number, because it is equal to n+sod(n) for n = 69291096 and 69291105.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23338 + ... + 26138.

It is an arithmetic number, because the mean of its divisors is an integer number (2689920).

Almost surely, 2^69291138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 69291138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86077440).

69291138 is an abundant number, since it is smaller than the sum of its proper divisors (102863742).

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

69291138 is a wasteful number, since it uses less digits than its factorization.

69291138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2863.

The product of its digits is 23328, while the sum is 39.

The square root of 69291138 is about 8324.1298644363. The cubic root of 69291138 is about 410.7326539068.

The spelling of 69291138 in words is "sixty-nine million, two hundred ninety-one thousand, one hundred thirty-eight".