16386390 has 48 divisors (see below), whose sum is σ = 42904368. Its totient is φ = 4339008.

The previous prime is 16386389. The next prime is 16386401. The reversal of 16386390 is 9368361.

It is a happy number.

16386390 is a `hidden beast` number, since 16 + 3 + 8 + 639 + 0 = 666.

16386390 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×16386390³ (a number of 23 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14112 + ... + 15228.

It is an arithmetic number, because the mean of its divisors is an integer number (893841).

Almost surely, 2^16386390 is an apocalyptic number.

16386390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16386390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21452184).

16386390 is an abundant number, since it is smaller than the sum of its proper divisors (26517978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16386390 is a wasteful number, since it uses less digits than its factorization.

16386390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293 (or 1290 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 16386390 is about 4048.0106225157. The cubic root of 16386390 is about 253.9965176120.

The spelling of 16386390 in words is "sixteen million, three hundred eighty-six thousand, three hundred ninety".