431161740 has 144 divisors (see below), whose sum is σ = 1376837280. Its totient is φ = 109071360.

The previous prime is 431161739. The next prime is 431161789. The reversal of 431161740 is 47161134.

It is a happy number.

431161740 is a `hidden beast` number, since 4 + 3 + 1 + 1 + 617 + 40 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 272271 + ... + 273849.

It is an arithmetic number, because the mean of its divisors is an integer number (9561370).

Almost surely, 2^431161740 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 431161740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (688418640).

431161740 is an abundant number, since it is smaller than the sum of its proper divisors (945675540).

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

431161740 is a wasteful number, since it uses less digits than its factorization.

431161740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672 (or 1667 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 431161740 is about 20764.4344974767. The cubic root of 431161740 is about 755.4633589764.

The spelling of 431161740 in words is "four hundred thirty-one million, one hundred sixty-one thousand, seven hundred forty".