216769392 has 160 divisors (see below), whose sum is σ = 719398400. Its totient is φ = 61212672.

The previous prime is 216769381. The next prime is 216769393. The reversal of 216769392 is 293967612.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216769393) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 292959 + ... + 293697.

It is an arithmetic number, because the mean of its divisors is an integer number (4496240).

Almost surely, 2^216769392 is an apocalyptic number.

216769392 is the 9312-nd heptagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216769392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (359699200).

216769392 is an abundant number, since it is smaller than the sum of its proper divisors (502629008).

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

216769392 is a wasteful number, since it uses less digits than its factorization.

216769392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860 (or 848 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 216769392 is about 14723.0904364539. The cubic root of 216769392 is about 600.7115558136.

The spelling of 216769392 in words is "two hundred sixteen million, seven hundred sixty-nine thousand, three hundred ninety-two".