140639400 has 144 divisors (see below), whose sum is σ = 515324160. Its totient is φ = 34089600.

The previous prime is 140639383. The next prime is 140639413. The reversal of 140639400 is 4936041.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 16249 + ... + 23351.

It is an arithmetic number, because the mean of its divisors is an integer number (3578640).

Almost surely, 2^140639400 is an apocalyptic number.

140639400 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 140639400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257662080).

140639400 is an abundant number, since it is smaller than the sum of its proper divisors (374684760).

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

140639400 is a wasteful number, since it uses less digits than its factorization.

140639400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7136 (or 7124 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 140639400 is about 11859.1483673997. The cubic root of 140639400 is about 520.0387052058.

The spelling of 140639400 in words is "one hundred forty million, six hundred thirty-nine thousand, four hundred".