140740740 has 252 divisors, whose sum is σ = 518095116. Its totient is φ = 32006016.

The previous prime is 140740727. The next prime is 140740757. The reversal of 140740740 is 47047041.

It can be written as a sum of positive squares in 2 ways, for example, as 104162436 + 36578304 = 10206^2 + 6048^2 .

It is a tau number, because it is divible by the number of its divisors (252).

It is a Harshad number since it is a multiple of its sum of digits (27).

140740740 is a modest number, since divided by 740740 gives 140 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 714322 + ... + 714518.

It is an arithmetic number, because the mean of its divisors is an integer number (2055933).

Almost surely, 2^140740740 is an apocalyptic number.

140740740 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 140740740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259047558).

140740740 is an abundant number, since it is smaller than the sum of its proper divisors (377354376).

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

140740740 is a wasteful number, since it uses less digits than its factorization.

140740740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

The square root of 140740740 is about 11863.4202488153. The cubic root of 140740740 is about 520.1635826567.

Adding to 140740740 its reverse (47047041), we get a palindrome (187787781).

The spelling of 140740740 in words is "one hundred forty million, seven hundred forty thousand, seven hundred forty".