311140140 has 24 divisors (see below), whose sum is σ = 871192560. Its totient is φ = 82970688.

The previous prime is 311140139. The next prime is 311140153. The reversal of 311140140 is 41041113.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 2592775 + ... + 2592894.

It is an arithmetic number, because the mean of its divisors is an integer number (36299690).

Almost surely, 2^311140140 is an apocalyptic number.

311140140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

311140140 is an abundant number, since it is smaller than the sum of its proper divisors (560052420).

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

311140140 is a wasteful number, since it uses less digits than its factorization.

311140140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5185681 (or 5185679 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 311140140 is about 17639.1649462212. The cubic root of 311140140 is about 677.6186454522.

Adding to 311140140 its reverse (41041113), we get a palindrome (352181253).

The spelling of 311140140 in words is "three hundred eleven million, one hundred forty thousand, one hundred forty".