128149438 has 8 divisors (see below), whose sum is σ = 192339432. Its totient is φ = 64036296.

The previous prime is 128149423. The next prime is 128149457. The reversal of 128149438 is 834941821.

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

It is a self number, because there is not a number n which added to its sum of digits gives 128149438.

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, 14845 + ... + 21832.

It is an arithmetic number, because the mean of its divisors is an integer number (24042429).

Almost surely, 2^128149438 is an apocalyptic number.

128149438 is a deficient number, since it is larger than the sum of its proper divisors (64189994).

128149438 is a wasteful number, since it uses less digits than its factorization.

128149438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38426.

The product of its digits is 55296, while the sum is 40.

The square root of 128149438 is about 11320.3108614561. The cubic root of 128149438 is about 504.1644687684.

The spelling of 128149438 in words is "one hundred twenty-eight million, one hundred forty-nine thousand, four hundred thirty-eight".