16385400 has 72 divisors (see below), whose sum is σ = 55033680. Its totient is φ = 4368960.

The previous prime is 16385389. The next prime is 16385401. The reversal of 16385400 is 458361.

16385400 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 tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16385401) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2752 + ... + 6351.

Almost surely, 2^16385400 is an apocalyptic number.

16385400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16385400 is an abundant number, since it is smaller than the sum of its proper divisors (38648280).

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

16385400 is a wasteful number, since it uses less digits than its factorization.

16385400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9125 (or 9113 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 16385400 is about 4047.8883383809. Note that the first 3 decimals coincide. The cubic root of 16385400 is about 253.9914023585.

The spelling of 16385400 in words is "sixteen million, three hundred eighty-five thousand, four hundred".