16408429 has 8 divisors (see below), whose sum is σ = 16951032. Its totient is φ = 15874560.

The previous prime is 16408421. The next prime is 16408439. The reversal of 16408429 is 92480461.

It can be written as a sum of positive squares in 4 ways, for example, as 9622404 + 6786025 = 3102^2 + 2605^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16408429 - 2³ = 16408421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16408394 and 16408403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16408421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1749 + ... + 5989.

It is an arithmetic number, because the mean of its divisors is an integer number (2118879).

Almost surely, 2^16408429 is an apocalyptic number.

It is an amenable number.

16408429 is a deficient number, since it is larger than the sum of its proper divisors (542603).

16408429 is an equidigital number, since it uses as much as digits as its factorization.

16408429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4367.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 16408429 is about 4050.7319091739. The cubic root of 16408429 is about 254.1103381161.

The spelling of 16408429 in words is "sixteen million, four hundred eight thousand, four hundred twenty-nine".