128858345 has 24 divisors (see below), whose sum is σ = 194252352. Its totient is φ = 80324640.

The previous prime is 128858321. The next prime is 128858347. The reversal of 128858345 is 543858821.

It is not a de Polignac number, because 128858345 - 2¹⁴ = 128841961 is a prime.

It is a super-2 number, since 2×128858345² = 33208946152278050, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 128858296 and 128858305.

It is not an unprimeable number, because it can be changed into a prime (128858347) 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, 10979 + ... + 19448.

It is an arithmetic number, because the mean of its divisors is an integer number (8093848).

Almost surely, 2^128858345 is an apocalyptic number.

It is an amenable number.

128858345 is a deficient number, since it is larger than the sum of its proper divisors (65394007).

128858345 is a wasteful number, since it uses less digits than its factorization.

128858345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30461 (or 30450 counting only the distinct ones).

The product of its digits is 307200, while the sum is 44.

The square root of 128858345 is about 11351.5789650603. The cubic root of 128858345 is about 505.0924184679.

The spelling of 128858345 in words is "one hundred twenty-eight million, eight hundred fifty-eight thousand, three hundred forty-five".