16138742 has 8 divisors (see below), whose sum is σ = 24618600. Its totient is φ = 7932544.

The previous prime is 16138739. The next prime is 16138747. The reversal of 16138742 is 24783161.

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 = 16138699 and 16138708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16138747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68267 + ... + 68502.

It is an arithmetic number, because the mean of its divisors is an integer number (3077325).

Almost surely, 2^16138742 is an apocalyptic number.

16138742 is a deficient number, since it is larger than the sum of its proper divisors (8479858).

16138742 is a wasteful number, since it uses less digits than its factorization.

16138742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136830.

The product of its digits is 8064, while the sum is 32.

The square root of 16138742 is about 4017.3053157558. The cubic root of 16138742 is about 252.7104646574.

The spelling of 16138742 in words is "sixteen million, one hundred thirty-eight thousand, seven hundred forty-two".