20150128 has 20 divisors (see below), whose sum is σ = 40388040. Its totient is φ = 9727424.

The previous prime is 20150111. The next prime is 20150131. The reversal of 20150128 is 82105102.

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, 21250 + ... + 22177.

It is an arithmetic number, because the mean of its divisors is an integer number (2019402).

Almost surely, 2^20150128 is an apocalyptic number.

It is an amenable number.

20150128 is an abundant number, since it is smaller than the sum of its proper divisors (20237912).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20150128 is a wasteful number, since it uses less digits than its factorization.

20150128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43464 (or 43458 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 20150128 is about 4488.8893949395. The cubic root of 20150128 is about 272.1192527834.

The spelling of 20150128 in words is "twenty million, one hundred fifty thousand, one hundred twenty-eight".