140020450 has 24 divisors (see below), whose sum is σ = 262111572. Its totient is φ = 55648320.

The previous prime is 140020429. The next prime is 140020451. The reversal of 140020450 is 54020041.

It can be written as a sum of positive squares in 6 ways, for example, as 62773929 + 77246521 = 7923^2 + 8789^2 .

It is not an unprimeable number, because it can be changed into a prime (140020451) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1069 + ... + 16768.

Almost surely, 2^140020450 is an apocalyptic number.

140020450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

140020450 is a deficient number, since it is larger than the sum of its proper divisors (122091122).

140020450 is a wasteful number, since it uses less digits than its factorization.

140020450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18006 (or 18001 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 140020450 is about 11833.0237048694. The cubic root of 140020450 is about 519.2746914552.

Adding to 140020450 its reverse (54020041), we get a palindrome (194040491).

The spelling of 140020450 in words is "one hundred forty million, twenty thousand, four hundred fifty".