140020128 has 36 divisors (see below), whose sum is σ = 398183058. Its totient is φ = 46673280.

The previous prime is 140020103. The next prime is 140020141. The reversal of 140020128 is 821020041.

It can be written as a sum of positive squares in only one way, i.e., 132987024 + 7033104 = 11532^2 + 2652^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 140020128.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 242803 + ... + 243378.

Almost surely, 2^140020128 is an apocalyptic number.

140020128 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

140020128 is an abundant number, since it is smaller than the sum of its proper divisors (258162930).

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

140020128 is a wasteful number, since it uses less digits than its factorization.

140020128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486197 (or 486186 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 140020128 is about 11833.0100988717. The cubic root of 140020128 is about 519.2742934025.

Adding to 140020128 its reverse (821020041), we get a palindrome (961040169).

It can be divided in two parts, 1400 and 20128, that added together give a triangular number (21528 = T₂₀₇).

The spelling of 140020128 in words is "one hundred forty million, twenty thousand, one hundred twenty-eight".