140020452 has 144 divisors (see below), whose sum is σ = 423783360. Its totient is φ = 38419200.

The previous prime is 140020451. The next prime is 140020457. The reversal of 140020452 is 254020041.

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

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 47 ways as a sum of consecutive naturals, for example, 303502 + ... + 303962.

It is an arithmetic number, because the mean of its divisors is an integer number (2942940).

Almost surely, 2^140020452 is an apocalyptic number.

140020452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 140020452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211891680).

140020452 is an abundant number, since it is smaller than the sum of its proper divisors (283762908).

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

140020452 is a wasteful number, since it uses less digits than its factorization.

140020452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554 (or 549 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 140020452 is about 11833.0237893786. The cubic root of 140020452 is about 519.2746939276.

Adding to 140020452 its reverse (254020041), we get a palindrome (394040493).

The spelling of 140020452 in words is "one hundred forty million, twenty thousand, four hundred fifty-two".