216864692 has 36 divisors (see below), whose sum is σ = 419403264. Its totient is φ = 97302240.

The previous prime is 216864691. The next prime is 216864709. The reversal of 216864692 is 296468612.

216864692 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216864691) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1100738 + ... + 1100934.

Almost surely, 2^216864692 is an apocalyptic number.

216864692 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

216864692 is a deficient number, since it is larger than the sum of its proper divisors (202538572).

216864692 is a wasteful number, since it uses less digits than its factorization.

216864692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536 (or 337 counting only the distinct ones).

The product of its digits is 248832, while the sum is 44.

The square root of 216864692 is about 14726.3264937322. The cubic root of 216864692 is about 600.7995747345.

The spelling of 216864692 in words is "two hundred sixteen million, eight hundred sixty-four thousand, six hundred ninety-two".