216300400 has 30 divisors (see below), whose sum is σ = 519662672. Its totient is φ = 86520000.

The previous prime is 216300377. The next prime is 216300451. The reversal of 216300400 is 4003612.

It is a Harshad number since it is a multiple of its sum of digits (16).

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, 269976 + ... + 270775.

Almost surely, 2^216300400 is an apocalyptic number.

216300400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216300400 is an abundant number, since it is smaller than the sum of its proper divisors (303362272).

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

216300400 is a wasteful number, since it uses less digits than its factorization.

216300400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540769 (or 540758 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 216300400 is about 14707.1547214273. The cubic root of 216300400 is about 600.2780193037.

The spelling of 216300400 in words is "two hundred sixteen million, three hundred thousand, four hundred".