909423378 has 96 divisors (see below), whose sum is σ = 2106703872. Its totient is φ = 283046400.

The previous prime is 909423377. The next prime is 909423397. The reversal of 909423378 is 873324909.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (909423371) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2905350 + ... + 2905662.

It is an arithmetic number, because the mean of its divisors is an integer number (21944832).

Almost surely, 2^909423378 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 909423378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1053351936).

909423378 is an abundant number, since it is smaller than the sum of its proper divisors (1197280494).

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

909423378 is a wasteful number, since it uses less digits than its factorization.

909423378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520 (or 517 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 909423378 is about 30156.6473269162. The cubic root of 909423378 is about 968.8473849626.

The spelling of 909423378 in words is "nine hundred nine million, four hundred twenty-three thousand, three hundred seventy-eight".