16442738 has 16 divisors (see below), whose sum is σ = 26960640. Its totient is φ = 7474896.

The previous prime is 16442737. The next prime is 16442749. The reversal of 16442738 is 83724461.

It is a super-3 number, since 3×16442738³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16442698 and 16442707.

It is not an unprimeable number, because it can be changed into a prime (16442731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2978 + ... + 6461.

It is an arithmetic number, because the mean of its divisors is an integer number (1685040).

Almost surely, 2^16442738 is an apocalyptic number.

16442738 is a deficient number, since it is larger than the sum of its proper divisors (10517902).

16442738 is a wasteful number, since it uses less digits than its factorization.

16442738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9521.

The product of its digits is 32256, while the sum is 35.

The square root of 16442738 is about 4054.9646114362. The cubic root of 16442738 is about 254.2873244318.

The spelling of 16442738 in words is "sixteen million, four hundred forty-two thousand, seven hundred thirty-eight".