128144858 has 4 divisors (see below), whose sum is σ = 192217290. Its totient is φ = 64072428.

The previous prime is 128144843. The next prime is 128144867. The reversal of 128144858 is 858441821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 116359369 + 11785489 = 10787^2 + 3433^2 .

It is a super-2 number, since 2×128144858² = 32842209263680328, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32036213 + ... + 32036216.

Almost surely, 2^128144858 is an apocalyptic number.

128144858 is a deficient number, since it is larger than the sum of its proper divisors (64072432).

128144858 is an equidigital number, since it uses as much as digits as its factorization.

128144858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64072431.

The product of its digits is 81920, while the sum is 41.

The square root of 128144858 is about 11320.1085683840. The cubic root of 128144858 is about 504.1584624973.

The spelling of 128144858 in words is "one hundred twenty-eight million, one hundred forty-four thousand, eight hundred fifty-eight".