918216372 has 12 divisors (see below), whose sum is σ = 2142504896. Its totient is φ = 306072120.

The previous prime is 918216337. The next prime is 918216379. The reversal of 918216372 is 273612819.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×918216372³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 918216372.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (918216379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38259004 + ... + 38259027.

Almost surely, 2^918216372 is an apocalyptic number.

It is an amenable number.

918216372 is an abundant number, since it is smaller than the sum of its proper divisors (1224288524).

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

918216372 is a wasteful number, since it uses less digits than its factorization.

918216372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76518038 (or 76518036 counting only the distinct ones).

The product of its digits is 36288, while the sum is 39.

The square root of 918216372 is about 30302.0852747794. The cubic root of 918216372 is about 971.9598918233.

The spelling of 918216372 in words is "nine hundred eighteen million, two hundred sixteen thousand, three hundred seventy-two".