16021400 has 24 divisors (see below), whose sum is σ = 37250220. Its totient is φ = 6408480.

The previous prime is 16021399. The next prime is 16021417. The reversal of 16021400 is 412061.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39854 + ... + 40253.

Almost surely, 2^16021400 is an apocalyptic number.

16021400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16021400 is an abundant number, since it is smaller than the sum of its proper divisors (21228820).

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

16021400 is a wasteful number, since it uses less digits than its factorization.

16021400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80123 (or 80114 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 16021400 is about 4002.6741061445. The cubic root of 16021400 is about 252.0965028902.

Adding to 16021400 its reverse (412061), we get a palindrome (16433461).

The spelling of 16021400 in words is "sixteen million, twenty-one thousand, four hundred".