431278542 has 24 divisors (see below), whose sum is σ = 989404416. Its totient is φ = 135302976.

The previous prime is 431278537. The next prime is 431278579. The reversal of 431278542 is 245872134.

It is a happy number.

431278542 is a `hidden beast` number, since 43 + 1 + 2 + 78 + 542 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 431278497 and 431278506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 704398 + ... + 705009.

It is an arithmetic number, because the mean of its divisors is an integer number (41225184).

Almost surely, 2^431278542 is an apocalyptic number.

431278542 is an abundant number, since it is smaller than the sum of its proper divisors (558125874).

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

431278542 is a wasteful number, since it uses less digits than its factorization.

431278542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1409432 (or 1409429 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 431278542 is about 20767.2468565287. The cubic root of 431278542 is about 755.5315713247.

The spelling of 431278542 in words is "four hundred thirty-one million, two hundred seventy-eight thousand, five hundred forty-two".