919798464 has 224 divisors, whose sum is σ = 2834274240. Its totient is φ = 260702208.

The previous prime is 919798457. The next prime is 919798483. The reversal of 919798464 is 464897919.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2248692 + ... + 2249100.

It is an arithmetic number, because the mean of its divisors is an integer number (12653010).

Almost surely, 2^919798464 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 919798464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1417137120).

919798464 is an abundant number, since it is smaller than the sum of its proper divisors (1914475776).

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

919798464 is a wasteful number, since it uses less digits than its factorization.

919798464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507 (or 497 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 57.

The square root of 919798464 is about 30328.1793716669. The cubic root of 919798464 is about 972.5178023144.

The spelling of 919798464 in words is "nine hundred nineteen million, seven hundred ninety-eight thousand, four hundred sixty-four".