402433431 has 16 divisors (see below), whose sum is σ = 549833856. Its totient is φ = 261678816.

The previous prime is 402433417. The next prime is 402433439. The reversal of 402433431 is 134334204.

It is not a de Polignac number, because 402433431 - 2¹¹ = 402431383 is a prime.

It is a super-2 number, since 2×402433431² = 323905332772863522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402433439) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 112141 + ... + 115673.

It is an arithmetic number, because the mean of its divisors is an integer number (34364616).

Almost surely, 2^402433431 is an apocalyptic number.

402433431 is a deficient number, since it is larger than the sum of its proper divisors (147400425).

402433431 is a wasteful number, since it uses less digits than its factorization.

402433431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4462.

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 402433431 is about 20060.7435305873. The cubic root of 402433431 is about 738.2974194318.

Adding to 402433431 its reverse (134334204), we get a palindrome (536767635).

The spelling of 402433431 in words is "four hundred two million, four hundred thirty-three thousand, four hundred thirty-one".