140310306 has 40 divisors (see below), whose sum is σ = 317675820. Its totient is φ = 46282752.

The previous prime is 140310293. The next prime is 140310329. The reversal of 140310306 is 603013041.

140310306 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 2 ways, for example, as 126360081 + 13950225 = 11241^2 + 3735^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11250 + ... + 20178.

Almost surely, 2^140310306 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 140310306, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158837910).

140310306 is an abundant number, since it is smaller than the sum of its proper divisors (177365514).

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

140310306 is an equidigital number, since it uses as much as digits as its factorization.

140310306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9040 (or 9031 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 140310306 is about 11845.2651300003. The cubic root of 140310306 is about 519.6327609231.

Adding to 140310306 its reverse (603013041), we get a palindrome (743323347).

The spelling of 140310306 in words is "one hundred forty million, three hundred ten thousand, three hundred six".