918209940 has 24 divisors (see below), whose sum is σ = 2570988000. Its totient is φ = 244855968.

The previous prime is 918209893. The next prime is 918209951. The reversal of 918209940 is 49902819.

It is a junction number, because it is equal to n+sod(n) for n = 918209892 and 918209901.

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, 7651690 + ... + 7651809.

It is an arithmetic number, because the mean of its divisors is an integer number (107124500).

Almost surely, 2^918209940 is an apocalyptic number.

It is an amenable number.

918209940 is an abundant number, since it is smaller than the sum of its proper divisors (1652778060).

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

918209940 is a wasteful number, since it uses less digits than its factorization.

918209940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15303511 (or 15303509 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 918209940 is about 30301.9791432837. The cubic root of 918209940 is about 971.9576223290.

The spelling of 918209940 in words is "nine hundred eighteen million, two hundred nine thousand, nine hundred forty".