381432777 has 48 divisors (see below), whose sum is σ = 580177920. Its totient is φ = 222599520.

The previous prime is 381432769. The next prime is 381432781. The reversal of 381432777 is 777234183.

It is not a de Polignac number, because 381432777 - 2³ = 381432769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (381432677) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1347678 + ... + 1347960.

It is an arithmetic number, because the mean of its divisors is an integer number (12087040).

Almost surely, 2^381432777 is an apocalyptic number.

It is an amenable number.

381432777 is a deficient number, since it is larger than the sum of its proper divisors (198745143).

381432777 is a wasteful number, since it uses less digits than its factorization.

381432777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434 (or 423 counting only the distinct ones).

The product of its digits is 197568, while the sum is 42.

The square root of 381432777 is about 19530.3040682935. The cubic root of 381432777 is about 725.2248383907.

The spelling of 381432777 in words is "three hundred eighty-one million, four hundred thirty-two thousand, seven hundred seventy-seven".