917923940 has 12 divisors (see below), whose sum is σ = 1927640316. Its totient is φ = 367169568.

The previous prime is 917923889. The next prime is 917923957. The reversal of 917923940 is 49329719.

917923940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 605553664 + 312370276 = 24608^2 + 17674^2 .

It is a junction number, because it is equal to n+sod(n) for n = 917923891 and 917923900.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22948079 + ... + 22948118.

It is an arithmetic number, because the mean of its divisors is an integer number (160636693).

Almost surely, 2^917923940 is an apocalyptic number.

It is an amenable number.

917923940 is an abundant number, since it is smaller than the sum of its proper divisors (1009716376).

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

917923940 is a wasteful number, since it uses less digits than its factorization.

917923940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45896206 (or 45896204 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 44.

The square root of 917923940 is about 30297.2596120507. The cubic root of 917923940 is about 971.8566981524.

The spelling of 917923940 in words is "nine hundred seventeen million, nine hundred twenty-three thousand, nine hundred forty".