381071778 has 32 divisors (see below), whose sum is σ = 794406912. Its totient is φ = 121726800.

The previous prime is 381071773. The next prime is 381071783. The reversal of 381071778 is 877170183.

381071778 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (381071773) and next prime (381071783).

It is not an unprimeable number, because it can be changed into a prime (381071773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9213 + ... + 29103.

It is an arithmetic number, because the mean of its divisors is an integer number (24825216).

Almost surely, 2^381071778 is an apocalyptic number.

381071778 is an abundant number, since it is smaller than the sum of its proper divisors (413335134).

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

381071778 is a wasteful number, since it uses less digits than its factorization.

381071778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20030.

The product of its (nonzero) digits is 65856, while the sum is 42.

The square root of 381071778 is about 19521.0598585220. The cubic root of 381071778 is about 724.9959749281.

The spelling of 381071778 in words is "three hundred eighty-one million, seventy-one thousand, seven hundred seventy-eight".