519966378 has 40 divisors (see below), whose sum is σ = 1171907748. Its totient is φ = 172310976.

The previous prime is 519966353. The next prime is 519966401. The reversal of 519966378 is 873669915.

519966378 is a `hidden beast` number, since 519 + 96 + 6 + 37 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 519703209 + 263169 = 22797^2 + 513^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18750 + ... + 37302.

Almost surely, 2^519966378 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 519966378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (585953874).

519966378 is an abundant number, since it is smaller than the sum of its proper divisors (651941370).

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

519966378 is a wasteful number, since it uses less digits than its factorization.

519966378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18740 (or 18731 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The square root of 519966378 is about 22802.7712789477. The cubic root of 519966378 is about 804.1278199543.

The spelling of 519966378 in words is "five hundred nineteen million, nine hundred sixty-six thousand, three hundred seventy-eight".