216934536 has 128 divisors (see below), whose sum is σ = 677376000. Its totient is φ = 56367360.

The previous prime is 216934519. The next prime is 216934537. The reversal of 216934536 is 635439612.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 216934494 and 216934503.

It is not an unprimeable number, because it can be changed into a prime (216934537) 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, 154365 + ... + 155763.

It is an arithmetic number, because the mean of its divisors is an integer number (5292000).

Almost surely, 2^216934536 is an apocalyptic number.

216934536 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216934536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (338688000).

216934536 is an abundant number, since it is smaller than the sum of its proper divisors (460441464).

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

216934536 is a wasteful number, since it uses less digits than its factorization.

216934536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1499 (or 1495 counting only the distinct ones).

The product of its digits is 116640, while the sum is 39.

The square root of 216934536 is about 14728.6977021052. The cubic root of 216934536 is about 600.8640661632.

It can be divided in two parts, 216934 and 536, that added together give a triangular number (217470 = T₆₅₉).

The spelling of 216934536 in words is "two hundred sixteen million, nine hundred thirty-four thousand, five hundred thirty-six".