381196778 has 4 divisors (see below), whose sum is σ = 571795170. Its totient is φ = 190598388.

The previous prime is 381196771. The next prime is 381196807. The reversal of 381196778 is 877691183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 877691183 = 53 ⋅16560211.

It can be written as a sum of positive squares in only one way, i.e., 365459689 + 15737089 = 19117^2 + 3967^2 .

It is not an unprimeable number, because it can be changed into a prime (381196771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95299193 + ... + 95299196.

Almost surely, 2^381196778 is an apocalyptic number.

381196778 is a deficient number, since it is larger than the sum of its proper divisors (190598392).

381196778 is a wasteful number, since it uses less digits than its factorization.

381196778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190598391.

The product of its digits is 508032, while the sum is 50.

The square root of 381196778 is about 19524.2612664346. The cubic root of 381196778 is about 725.0752378517.

The spelling of 381196778 in words is "three hundred eighty-one million, one hundred ninety-six thousand, seven hundred seventy-eight".