920817378 has 24 divisors (see below), whose sum is σ = 2148574428. Its totient is φ = 283328352.

The previous prime is 920817343. The next prime is 920817383. The reversal of 920817378 is 873718029.

It can be written as a sum of positive squares in 2 ways, for example, as 651627729 + 269189649 = 25527^2 + 16407^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1967325 + ... + 1967792.

Almost surely, 2^920817378 is an apocalyptic number.

920817378 is an abundant number, since it is smaller than the sum of its proper divisors (1227757050).

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

920817378 is a wasteful number, since it uses less digits than its factorization.

920817378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3935138 (or 3935135 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The square root of 920817378 is about 30344.9728620739. The cubic root of 920817378 is about 972.8767745498.

The spelling of 920817378 in words is "nine hundred twenty million, eight hundred seventeen thousand, three hundred seventy-eight".