128567438 has 8 divisors (see below), whose sum is σ = 193004640. Its totient is φ = 64232560.

The previous prime is 128567423. The next prime is 128567441. The reversal of 128567438 is 834765821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×128567438² = 33059172227767688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22358 + ... + 27513.

It is an arithmetic number, because the mean of its divisors is an integer number (24125580).

Almost surely, 2^128567438 is an apocalyptic number.

128567438 is a deficient number, since it is larger than the sum of its proper divisors (64437202).

128567438 is a wasteful number, since it uses less digits than its factorization.

128567438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51162.

The product of its digits is 322560, while the sum is 44.

The square root of 128567438 is about 11338.7582212516. The cubic root of 128567438 is about 504.7120379006.

The spelling of 128567438 in words is "one hundred twenty-eight million, five hundred sixty-seven thousand, four hundred thirty-eight".