140440340 has 24 divisors (see below), whose sum is σ = 296158632. Its totient is φ = 55941120.

The previous prime is 140440331. The next prime is 140440351. The reversal of 140440340 is 43044041.

140440340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 59043856 + 81396484 = 7684^2 + 9022^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9749 + ... + 19388.

It is an arithmetic number, because the mean of its divisors is an integer number (12339943).

Almost surely, 2^140440340 is an apocalyptic number.

140440340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140440340 is an abundant number, since it is smaller than the sum of its proper divisors (155718292).

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

140440340 is a wasteful number, since it uses less digits than its factorization.

140440340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29387 (or 29385 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 140440340 is about 11850.7527187095. The cubic root of 140440340 is about 519.7932363375.

Adding to 140440340 its reverse (43044041), we get a palindrome (183484381).

The spelling of 140440340 in words is "one hundred forty million, four hundred forty thousand, three hundred forty".