69989472 has 144 divisors (see below), whose sum is σ = 229975200. Its totient is φ = 19777536.

The previous prime is 69989471. The next prime is 69989489. The reversal of 69989472 is 27498996.

69989472 is a `hidden beast` number, since 6 + 99 + 89 + 472 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69989471) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 300268 + ... + 300500.

It is an arithmetic number, because the mean of its divisors is an integer number (1597050).

Almost surely, 2^69989472 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 69989472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114987600).

69989472 is an abundant number, since it is smaller than the sum of its proper divisors (159985728).

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

69989472 is a wasteful number, since it uses less digits than its factorization.

69989472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405 (or 394 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 69989472 is about 8365.9710733423. The cubic root of 69989472 is about 412.1078675680.

The spelling of 69989472 in words is "sixty-nine million, nine hundred eighty-nine thousand, four hundred seventy-two".