216387396 has 48 divisors (see below), whose sum is σ = 576177280. Its totient is φ = 70178400.

The previous prime is 216387383. The next prime is 216387419. The reversal of 216387396 is 693783612.

216387396 is a `hidden beast` number, since 2 + 1 + 638 + 7 + 3 + 9 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23080 + ... + 31071.

Almost surely, 2^216387396 is an apocalyptic number.

It is an amenable number.

216387396 is an abundant number, since it is smaller than the sum of its proper divisors (359789884).

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

216387396 is a wasteful number, since it uses less digits than its factorization.

216387396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54201 (or 54193 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 216387396 is about 14710.1120322042. The cubic root of 216387396 is about 600.3584857706.

The spelling of 216387396 in words is "two hundred sixteen million, three hundred eighty-seven thousand, three hundred ninety-six".