149128438 has 8 divisors (see below), whose sum is σ = 225194400. Its totient is φ = 74063640.

The previous prime is 149128433. The next prime is 149128453. The reversal of 149128438 is 834821941.

149128438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 149128438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149128433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249918 + ... + 250513.

It is an arithmetic number, because the mean of its divisors is an integer number (28149300).

Almost surely, 2^149128438 is an apocalyptic number.

149128438 is a deficient number, since it is larger than the sum of its proper divisors (76065962).

149128438 is a wasteful number, since it uses less digits than its factorization.

149128438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500582.

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

The square root of 149128438 is about 12211.8155079415. The cubic root of 149128438 is about 530.2982040841.

It can be divided in two parts, 1491 and 28438, that added together give a square (29929 = 173²).

The spelling of 149128438 in words is "one hundred forty-nine million, one hundred twenty-eight thousand, four hundred thirty-eight".