140138244 has 27 divisors (see below), whose sum is σ = 354417973. Its totient is φ = 46689072.

The previous prime is 140138239. The next prime is 140138263. The reversal of 140138244 is 442831041.

The square root of 140138244 is 11838.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 30140100 + 109998144 = 5490^2 + 10488^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 70042 + ... + 72014.

Almost surely, 2^140138244 is an apocalyptic number.

140138244 is the 11838-th square number.

It is an amenable number.

140138244 is an abundant number, since it is smaller than the sum of its proper divisors (214279729).

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

140138244 is an equidigital number, since it uses as much as digits as its factorization.

140138244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3956 (or 1978 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The cubic root of 140138244 is about 519.4202661395.

Adding to 140138244 its reverse (442831041), we get a palindrome (582969285).

It can be divided in two parts, 140 and 138244, that added together give a square (138384 = 372²).

The spelling of 140138244 in words is "one hundred forty million, one hundred thirty-eight thousand, two hundred forty-four".