216378932 has 24 divisors (see below), whose sum is σ = 472100160. Its totient is φ = 84303360.

The previous prime is 216378919. The next prime is 216378971. The reversal of 216378932 is 239873612.

It is a self number, because there is not a number n which added to its sum of digits gives 216378932.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350957 + ... + 351572.

It is an arithmetic number, because the mean of its divisors is an integer number (19670840).

Almost surely, 2^216378932 is an apocalyptic number.

216378932 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

216378932 is an abundant number, since it is smaller than the sum of its proper divisors (255721228).

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

216378932 is a wasteful number, since it uses less digits than its factorization.

216378932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702551 (or 702549 counting only the distinct ones).

The product of its digits is 108864, while the sum is 41.

The square root of 216378932 is about 14709.8243361367. The cubic root of 216378932 is about 600.3506579880.

The spelling of 216378932 in words is "two hundred sixteen million, three hundred seventy-eight thousand, nine hundred thirty-two".