387777769 has 16 divisors (see below), whose sum is σ = 429328512. Its totient is φ = 348375808.

The previous prime is 387777721. The next prime is 387777811. The reversal of 387777769 is 967777783.

It is a cyclic number.

It is not a de Polignac number, because 387777769 - 2⁷ = 387777641 is a prime.

It is a super-2 number, since 2×387777769² = 300743196261234722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387777869) 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, 301602 + ... + 302884.

It is an arithmetic number, because the mean of its divisors is an integer number (26833032).

Almost surely, 2^387777769 is an apocalyptic number.

It is an amenable number.

387777769 is a deficient number, since it is larger than the sum of its proper divisors (41550743).

387777769 is a wasteful number, since it uses less digits than its factorization.

387777769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2096.

The product of its digits is 21781872, while the sum is 61.

The square root of 387777769 is about 19692.0737607800. The cubic root of 387777769 is about 729.2240262658.

The spelling of 387777769 in words is "three hundred eighty-seven million, seven hundred seventy-seven thousand, seven hundred sixty-nine".