69145128 has 96 divisors (see below), whose sum is σ = 208266240. Its totient is φ = 20580480.

The previous prime is 69145121. The next prime is 69145129. The reversal of 69145128 is 82154196.

It is a super-2 number, since 2×69145128² = 9562097452272768, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 69145092 and 69145101.

It is not an unprimeable number, because it can be changed into a prime (69145121) 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, 27825 + ... + 30207.

It is an arithmetic number, because the mean of its divisors is an integer number (2169440).

Almost surely, 2^69145128 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 69145128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104133120).

69145128 is an abundant number, since it is smaller than the sum of its proper divisors (139121112).

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

69145128 is a wasteful number, since it uses less digits than its factorization.

69145128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2439 (or 2432 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 69145128 is about 8315.3549533378. The cubic root of 69145128 is about 410.4439529775.

The spelling of 69145128 in words is "sixty-nine million, one hundred forty-five thousand, one hundred twenty-eight".