431204140 has 12 divisors (see below), whose sum is σ = 905528736. Its totient is φ = 172481648.

The previous prime is 431204113. The next prime is 431204143. The reversal of 431204140 is 41402134.

It is not an unprimeable number, because it can be changed into a prime (431204143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10780084 + ... + 10780123.

It is an arithmetic number, because the mean of its divisors is an integer number (75460728).

Almost surely, 2^431204140 is an apocalyptic number.

It is an amenable number.

431204140 is an abundant number, since it is smaller than the sum of its proper divisors (474324596).

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

431204140 is a wasteful number, since it uses less digits than its factorization.

431204140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21560216 (or 21560214 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 431204140 is about 20765.4554488940. The cubic root of 431204140 is about 755.4881219934.

Adding to 431204140 its reverse (41402134), we get a palindrome (472606274).

The spelling of 431204140 in words is "four hundred thirty-one million, two hundred four thousand, one hundred forty".