16311432 has 32 divisors (see below), whose sum is σ = 43178400. Its totient is φ = 5117184.

The previous prime is 16311419. The next prime is 16311467. The reversal of 16311432 is 23411361.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 16311399 and 16311408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19582 + ... + 20397.

It is an arithmetic number, because the mean of its divisors is an integer number (1349325).

Almost surely, 2^16311432 is an apocalyptic number.

16311432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16311432 is an abundant number, since it is smaller than the sum of its proper divisors (26866968).

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

16311432 is a wasteful number, since it uses less digits than its factorization.

16311432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40005 (or 40001 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

The square root of 16311432 is about 4038.7413881060. The cubic root of 16311432 is about 253.6086311651.

Adding to 16311432 its reverse (23411361), we get a palindrome (39722793).

The spelling of 16311432 in words is "sixteen million, three hundred eleven thousand, four hundred thirty-two".