69144738 has 16 divisors (see below), whose sum is σ = 148927296. Its totient is φ = 21275280.

The previous prime is 69144721. The next prime is 69144767. The reversal of 69144738 is 83744196.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 69144738.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 443158 + ... + 443313.

It is an arithmetic number, because the mean of its divisors is an integer number (9307956).

Almost surely, 2^69144738 is an apocalyptic number.

69144738 is an abundant number, since it is smaller than the sum of its proper divisors (79782558).

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

69144738 is a wasteful number, since it uses less digits than its factorization.

69144738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886489.

The product of its digits is 145152, while the sum is 42.

The square root of 69144738 is about 8315.3315027123. The cubic root of 69144738 is about 410.4431812990.

The spelling of 69144738 in words is "sixty-nine million, one hundred forty-four thousand, seven hundred thirty-eight".