69689144 has 32 divisors (see below), whose sum is σ = 150115680. Its totient is φ = 29710464.

The previous prime is 69689143. The next prime is 69689153. The reversal of 69689144 is 44198696.

It is a happy number.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69689143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7874 + ... + 14190.

It is an arithmetic number, because the mean of its divisors is an integer number (4691115).

Almost surely, 2^69689144 is an apocalyptic number.

It is an amenable number.

69689144 is an abundant number, since it is smaller than the sum of its proper divisors (80426536).

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

69689144 is a wasteful number, since it uses less digits than its factorization.

69689144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6527 (or 6523 counting only the distinct ones).

The product of its digits is 373248, while the sum is 47.

The square root of 69689144 is about 8348.0023957831. The cubic root of 69689144 is about 411.5175645693.

The spelling of 69689144 in words is "sixty-nine million, six hundred eighty-nine thousand, one hundred forty-four".