16328440 has 16 divisors (see below), whose sum is σ = 36739080. Its totient is φ = 6531360.

The previous prime is 16328437. The next prime is 16328443. The reversal of 16328440 is 4482361.

It is an interprime number because it is at equal distance from previous prime (16328437) and next prime (16328443).

It is a junction number, because it is equal to n+sod(n) for n = 16328399 and 16328408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16328443) 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, 204066 + ... + 204145.

Almost surely, 2^16328440 is an apocalyptic number.

16328440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16328440 is an abundant number, since it is smaller than the sum of its proper divisors (20410640).

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

16328440 is a wasteful number, since it uses less digits than its factorization.

16328440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408222 (or 408218 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 16328440 is about 4040.8464459813. The cubic root of 16328440 is about 253.6967468146.

The spelling of 16328440 in words is "sixteen million, three hundred twenty-eight thousand, four hundred forty".