918925440 has 128 divisors (see below), whose sum is σ = 3056572800. Its totient is φ = 234381312.

The previous prime is 918925439. The next prime is 918925477. The reversal of 918925440 is 44529819.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 918925392 and 918925401.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33756 + ... + 54564.

It is an arithmetic number, because the mean of its divisors is an integer number (23879475).

Almost surely, 2^918925440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 918925440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1528286400).

918925440 is an abundant number, since it is smaller than the sum of its proper divisors (2137647360).

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

918925440 is a wasteful number, since it uses less digits than its factorization.

918925440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20854 (or 20842 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 918925440 is about 30313.7830037757. The cubic root of 918925440 is about 972.2100174480.

The spelling of 918925440 in words is "nine hundred eighteen million, nine hundred twenty-five thousand, four hundred forty".