69891444 has 144 divisors (see below), whose sum is σ = 216034560. Its totient is φ = 19474560.

The previous prime is 69891431. The next prime is 69891499. The reversal of 69891444 is 44419896.

It is a self number, because there is not a number n which added to its sum of digits gives 69891444.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 248584 + ... + 248864.

It is an arithmetic number, because the mean of its divisors is an integer number (1500240).

Almost surely, 2^69891444 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 69891444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108017280).

69891444 is an abundant number, since it is smaller than the sum of its proper divisors (146143116).

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

69891444 is a wasteful number, since it uses less digits than its factorization.

69891444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355 (or 340 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 69891444 is about 8360.1102863539. The cubic root of 69891444 is about 411.9153767821.

The spelling of 69891444 in words is "sixty-nine million, eight hundred ninety-one thousand, four hundred forty-four".