431235540 has 144 divisors (see below), whose sum is σ = 1360509696. Its totient is φ = 110476800.

The previous prime is 431235529. The next prime is 431235551. The reversal of 431235540 is 45532134.

It is an interprime number because it is at equal distance from previous prime (431235529) and next prime (431235551).

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 523569 + ... + 524391.

It is an arithmetic number, because the mean of its divisors is an integer number (9447984).

Almost surely, 2^431235540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 431235540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (680254848).

431235540 is an abundant number, since it is smaller than the sum of its proper divisors (929274156).

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

431235540 is a wasteful number, since it uses less digits than its factorization.

431235540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950 (or 945 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 431235540 is about 20766.2114984896. The cubic root of 431235540 is about 755.5064595966.

Adding to 431235540 its reverse (45532134), we get a palindrome (476767674).

The spelling of 431235540 in words is "four hundred thirty-one million, two hundred thirty-five thousand, five hundred forty".