69220128 has 24 divisors (see below), whose sum is σ = 181703088. Its totient is φ = 23073344.

The previous prime is 69220127. The next prime is 69220159. The reversal of 69220128 is 82102296.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×69220128² = 9582852240672768, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 69220095 and 69220104.

It is not an unprimeable number, because it can be changed into a prime (69220121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360426 + ... + 360617.

It is an arithmetic number, because the mean of its divisors is an integer number (7570962).

Almost surely, 2^69220128 is an apocalyptic number.

It is an amenable number.

69220128 is an abundant number, since it is smaller than the sum of its proper divisors (112482960).

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

69220128 is a wasteful number, since it uses less digits than its factorization.

69220128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721056 (or 721048 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 69220128 is about 8319.8634604181. The cubic root of 69220128 is about 410.5922988028.

The spelling of 69220128 in words is "sixty-nine million, two hundred twenty thousand, one hundred twenty-eight".