140909128 has 32 divisors (see below), whose sum is σ = 271638360. Its totient is φ = 68485120.

The previous prime is 140909113. The next prime is 140909129. The reversal of 140909128 is 821909041.

It can be written as a sum of positive squares in 4 ways, for example, as 67601284 + 73307844 = 8222^2 + 8562^2 .

It is a junction number, because it is equal to n+sod(n) for n = 140909093 and 140909102.

It is not an unprimeable number, because it can be changed into a prime (140909129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115176 + ... + 116392.

Almost surely, 2^140909128 is an apocalyptic number.

It is an amenable number.

140909128 is a deficient number, since it is larger than the sum of its proper divisors (130729232).

140909128 is a wasteful number, since it uses less digits than its factorization.

140909128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1617 (or 1613 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 140909128 is about 11870.5150688586. The cubic root of 140909128 is about 520.3709483343.

The spelling of 140909128 in words is "one hundred forty million, nine hundred nine thousand, one hundred twenty-eight".