2381783478 has 8 divisors (see below), whose sum is σ = 4763566968. Its totient is φ = 793927824.

The previous prime is 2381783477. The next prime is 2381783489. The reversal of 2381783478 is 8743871832.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

2381783478 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 2381783478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2381783473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198481951 + ... + 198481962.

It is an arithmetic number, because the mean of its divisors is an integer number (595445871).

Almost surely, 2^2381783478 is an apocalyptic number.

2381783478 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2381783478 is a wasteful number, since it uses less digits than its factorization.

2381783478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396963918.

The product of its digits is 1806336, while the sum is 51.

The square root of 2381783478 is about 48803.5191149163. The cubic root of 2381783478 is about 1335.4698656076.

The spelling of 2381783478 in words is "two billion, three hundred eighty-one million, seven hundred eighty-three thousand, four hundred seventy-eight".