140641128 has 24 divisors (see below), whose sum is σ = 380903250. Its totient is φ = 46880352.

The previous prime is 140641117. The next prime is 140641129. The reversal of 140641128 is 821146041.

It is a happy number.

140641128 is a `hidden beast` number, since 1 + 4 + 0 + 641 + 12 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 114447204 + 26193924 = 10698^2 + 5118^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×140641128² = 39559853770224768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (140641129) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 976603 + ... + 976746.

Almost surely, 2^140641128 is an apocalyptic number.

140641128 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

140641128 is an abundant number, since it is smaller than the sum of its proper divisors (240262122).

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

140641128 is a wasteful number, since it uses less digits than its factorization.

140641128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1953361 (or 1953354 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 140641128 is about 11859.2212223232. The cubic root of 140641128 is about 520.0408350575.

Adding to 140641128 its reverse (821146041), we get a palindrome (961787169).

The spelling of 140641128 in words is "one hundred forty million, six hundred forty-one thousand, one hundred twenty-eight".