381707777 has 16 divisors (see below), whose sum is σ = 444883200. Its totient is φ = 323825040.

The previous prime is 381707759. The next prime is 381707779. The reversal of 381707777 is 777707183.

It is a happy number.

It is not a de Polignac number, because 381707777 - 2⁶ = 381707713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381707779) 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, 374 + ... + 27632.

It is an arithmetic number, because the mean of its divisors is an integer number (27805200).

Almost surely, 2^381707777 is an apocalyptic number.

It is an amenable number.

381707777 is a deficient number, since it is larger than the sum of its proper divisors (63175423).

381707777 is a wasteful number, since it uses less digits than its factorization.

381707777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27356.

The product of its (nonzero) digits is 403368, while the sum is 47.

The square root of 381707777 is about 19537.3431407651. The cubic root of 381707777 is about 725.3990839658.

The spelling of 381707777 in words is "three hundred eighty-one million, seven hundred seven thousand, seven hundred seventy-seven".