431840634 has 16 divisors (see below), whose sum is σ = 863885088. Its totient is φ = 143912912.

The previous prime is 431840621. The next prime is 431840677. The reversal of 431840634 is 436048134.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 431840595 and 431840604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44269 + ... + 53135.

It is an arithmetic number, because the mean of its divisors is an integer number (53992818).

Almost surely, 2^431840634 is an apocalyptic number.

431840634 is an abundant number, since it is smaller than the sum of its proper divisors (432044454).

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

431840634 is a wasteful number, since it uses less digits than its factorization.

431840634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16989.

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 431840634 is about 20780.7755870660. The cubic root of 431840634 is about 755.8596608288.

Adding to 431840634 its reverse (436048134), we get a palindrome (867888768).

The spelling of 431840634 in words is "four hundred thirty-one million, eight hundred forty thousand, six hundred thirty-four".