431311140 has 72 divisors (see below), whose sum is σ = 1408957368. Its totient is φ = 106168320.

The previous prime is 431311117. The next prime is 431311159. The reversal of 431311140 is 41113134.

It can be written as a sum of positive squares in 4 ways, for example, as 40220964 + 391090176 = 6342^2 + 19776^2 .

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

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 23 ways as a sum of consecutive naturals, for example, 89821 + ... + 94500.

Almost surely, 2^431311140 is an apocalyptic number.

It is an amenable number.

431311140 is an abundant number, since it is smaller than the sum of its proper divisors (977646228).

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

431311140 is a wasteful number, since it uses less digits than its factorization.

431311140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184349 (or 184344 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 431311140 is about 20768.0316833348. The cubic root of 431311140 is about 755.5506063529.

Adding to 431311140 its reverse (41113134), we get a palindrome (472424274).

The spelling of 431311140 in words is "four hundred thirty-one million, three hundred eleven thousand, one hundred forty".