403431442 has 16 divisors (see below), whose sum is σ = 617258880. Its totient is φ = 197687152.

The previous prime is 403431421. The next prime is 403431449. The reversal of 403431442 is 244134304.

It is not an unprimeable number, because it can be changed into a prime (403431449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131943 + ... + 134965.

It is an arithmetic number, because the mean of its divisors is an integer number (38578680).

Almost surely, 2^403431442 is an apocalyptic number.

403431442 is a deficient number, since it is larger than the sum of its proper divisors (213827438).

403431442 is a wasteful number, since it uses less digits than its factorization.

403431442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4337.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 403431442 is about 20085.6028537856. The cubic root of 403431442 is about 738.9072268596.

Adding to 403431442 its reverse (244134304), we get a palindrome (647565746).

The spelling of 403431442 in words is "four hundred three million, four hundred thirty-one thousand, four hundred forty-two".