16386040 has 64 divisors (see below), whose sum is σ = 40642560. Its totient is φ = 5896320.

The previous prime is 16386031. The next prime is 16386043. The reversal of 16386040 is 4068361.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16386043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73369 + ... + 73591.

It is an arithmetic number, because the mean of its divisors is an integer number (635040).

Almost surely, 2^16386040 is an apocalyptic number.

16386040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16386040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20321280).

16386040 is an abundant number, since it is smaller than the sum of its proper divisors (24256520).

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

16386040 is a wasteful number, since it uses less digits than its factorization.

16386040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412 (or 408 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 16386040 is about 4047.9673911730. The cubic root of 16386040 is about 253.9947092125.

The spelling of 16386040 in words is "sixteen million, three hundred eighty-six thousand, forty".