16400722 has 8 divisors (see below), whose sum is σ = 26493516. Its totient is φ = 7569552.

The previous prime is 16400711. The next prime is 16400723. The reversal of 16400722 is 22700461.

It can be written as a sum of positive squares in 2 ways, for example, as 15912121 + 488601 = 3989^2 + 699^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 16400693 and 16400702.

It is not an unprimeable number, because it can be changed into a prime (16400723) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 315373 + ... + 315424.

Almost surely, 2^16400722 is an apocalyptic number.

16400722 is a deficient number, since it is larger than the sum of its proper divisors (10092794).

16400722 is a wasteful number, since it uses less digits than its factorization.

16400722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630812.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 16400722 is about 4049.7804878783. The cubic root of 16400722 is about 254.0705468787.

The spelling of 16400722 in words is "sixteen million, four hundred thousand, seven hundred twenty-two".