128458436 has 24 divisors (see below), whose sum is σ = 231276864. Its totient is φ = 62405280.

The previous prime is 128458433. The next prime is 128458439. The reversal of 128458436 is 634854821.

It is an interprime number because it is at equal distance from previous prime (128458433) and next prime (128458439).

It is a junction number, because it is equal to n+sod(n) for n = 128458393 and 128458402.

It is not an unprimeable number, because it can be changed into a prime (128458433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17081 + ... + 23423.

It is an arithmetic number, because the mean of its divisors is an integer number (9636536).

Almost surely, 2^128458436 is an apocalyptic number.

It is an amenable number.

128458436 is a deficient number, since it is larger than the sum of its proper divisors (102818428).

128458436 is a wasteful number, since it uses less digits than its factorization.

128458436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6491 (or 6489 counting only the distinct ones).

The product of its digits is 184320, while the sum is 41.

The square root of 128458436 is about 11333.9505910340. The cubic root of 128458436 is about 504.5693626446.

The spelling of 128458436 in words is "one hundred twenty-eight million, four hundred fifty-eight thousand, four hundred thirty-six".