16442385 has 8 divisors (see below), whose sum is σ = 26307840. Its totient is φ = 8769264.

The previous prime is 16442381. The next prime is 16442399. The reversal of 16442385 is 58324461.

16442385 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 16442385 - 2² = 16442381 is a prime.

It is a super-3 number, since 3×16442385³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (16442381) 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, 548065 + ... + 548094.

It is an arithmetic number, because the mean of its divisors is an integer number (3288480).

Almost surely, 2^16442385 is an apocalyptic number.

16442385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16442385 is a deficient number, since it is larger than the sum of its proper divisors (9865455).

16442385 is a wasteful number, since it uses less digits than its factorization.

16442385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096167.

The product of its digits is 23040, while the sum is 33.

The square root of 16442385 is about 4054.9210843122. The cubic root of 16442385 is about 254.2855047010.

The spelling of 16442385 in words is "sixteen million, four hundred forty-two thousand, three hundred eighty-five".