128030445 has 24 divisors (see below), whose sum is σ = 222310296. Its totient is φ = 68162688.

The previous prime is 128030437. The next prime is 128030453. The reversal of 128030445 is 544030821.

It is an interprime number because it is at equal distance from previous prime (128030437) and next prime (128030453).

It can be written as a sum of positive squares in 4 ways, for example, as 35928036 + 92102409 = 5994^2 + 9597^2 .

It is not a de Polignac number, because 128030445 - 2³ = 128030437 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27207 + ... + 31563.

It is an arithmetic number, because the mean of its divisors is an integer number (9262929).

Almost surely, 2^128030445 is an apocalyptic number.

128030445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128030445 is a deficient number, since it is larger than the sum of its proper divisors (94279851).

128030445 is a wasteful number, since it uses less digits than its factorization.

128030445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5021 (or 5018 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 128030445 is about 11315.0539106095. The cubic root of 128030445 is about 504.0083733492.

The spelling of 128030445 in words is "one hundred twenty-eight million, thirty thousand, four hundred forty-five".