140442400 has 144 divisors (see below), whose sum is σ = 404974080. Its totient is φ = 46540800.

The previous prime is 140442371. The next prime is 140442409. The reversal of 140442400 is 4244041.

140442400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (140442409) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 173196 + ... + 174004.

It is an arithmetic number, because the mean of its divisors is an integer number (2812320).

Almost surely, 2^140442400 is an apocalyptic number.

140442400 is a gapful number since it is divisible by the number (10) 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 140442400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202487040).

140442400 is an abundant number, since it is smaller than the sum of its proper divisors (264531680).

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

140442400 is a wasteful number, since it uses less digits than its factorization.

140442400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867 (or 854 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 140442400 is about 11850.8396327011. The cubic root of 140442400 is about 519.7957777935.

Adding to 140442400 its reverse (4244041), we get a palindrome (144686441).

The spelling of 140442400 in words is "one hundred forty million, four hundred forty-two thousand, four hundred".