381038778 has 12 divisors (see below), whose sum is σ = 825584058. Its totient is φ = 127012920.

The previous prime is 381038773. The next prime is 381038797. The reversal of 381038778 is 877830183.

It can be written as a sum of positive squares in only one way, i.e., 287200809 + 93837969 = 16947^2 + 9687^2 .

It is not an unprimeable number, because it can be changed into a prime (381038771) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10584393 + ... + 10584428.

Almost surely, 2^381038778 is an apocalyptic number.

381038778 is an abundant number, since it is smaller than the sum of its proper divisors (444545280).

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

381038778 is a wasteful number, since it uses less digits than its factorization.

381038778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21168829 (or 21168826 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 381038778 is about 19520.2145992302. The cubic root of 381038778 is about 724.9750466243.

The spelling of 381038778 in words is "three hundred eighty-one million, thirty-eight thousand, seven hundred seventy-eight".