16400402 has 8 divisors (see below), whose sum is σ = 24748416. Its totient is φ = 8150932.

The previous prime is 16400389. The next prime is 16400411. The reversal of 16400402 is 20400461.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24218 + ... + 24885.

It is an arithmetic number, because the mean of its divisors is an integer number (3093552).

Almost surely, 2^16400402 is an apocalyptic number.

16400402 is a deficient number, since it is larger than the sum of its proper divisors (8348014).

16400402 is a wasteful number, since it uses less digits than its factorization.

16400402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49272.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 16400402 is about 4049.7409793714. The cubic root of 16400402 is about 254.0688944493.

Adding to 16400402 its reverse (20400461), we get a palindrome (36800863).

The spelling of 16400402 in words is "sixteen million, four hundred thousand, four hundred two".