16001400 has 48 divisors (see below), whose sum is σ = 49606200. Its totient is φ = 4266880.

The previous prime is 16001393. The next prime is 16001413. The reversal of 16001400 is 410061.

16001400 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 Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12735 + ... + 13934.

Almost surely, 2^16001400 is an apocalyptic number.

16001400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16001400 is an abundant number, since it is smaller than the sum of its proper divisors (33604800).

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

16001400 is a wasteful number, since it uses less digits than its factorization.

16001400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26688 (or 26679 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 16001400 is about 4000.1749961720. The cubic root of 16001400 is about 251.9915593041.

Adding to 16001400 its reverse (410061), we get a palindrome (16411461).

The spelling of 16001400 in words is "sixteen million, one thousand, four hundred".