128164441 has 16 divisors (see below), whose sum is σ = 139221504. Its totient is φ = 117667264.

The previous prime is 128164433. The next prime is 128164469. The reversal of 128164441 is 144461821.

It is not a de Polignac number, because 128164441 - 2³ = 128164433 is a prime.

It is a super-2 number, since 2×128164441² = 32852247873684962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128164541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56175 + ... + 58411.

It is an arithmetic number, because the mean of its divisors is an integer number (8701344).

Almost surely, 2^128164441 is an apocalyptic number.

It is an amenable number.

128164441 is a deficient number, since it is larger than the sum of its proper divisors (11057063).

128164441 is a wasteful number, since it uses less digits than its factorization.

128164441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2360.

The product of its digits is 6144, while the sum is 31.

The square root of 128164441 is about 11320.9735005431. The cubic root of 128164441 is about 504.1841428938.

It can be divided in two parts, 128164 and 441, that multiplied together give a square (56520324 = 7518²).

The spelling of 128164441 in words is "one hundred twenty-eight million, one hundred sixty-four thousand, four hundred forty-one".