387428911 has 4 divisors (see below), whose sum is σ = 387555552. Its totient is φ = 387302272.

The previous prime is 387428903. The next prime is 387428927. The reversal of 387428911 is 119824783.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 387428911 - 2³ = 387428903 is a prime.

It is a super-2 number, since 2×387428911² = 300202322157291842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387428971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58615 + ... + 64888.

It is an arithmetic number, because the mean of its divisors is an integer number (96888888).

Almost surely, 2^387428911 is an apocalyptic number.

387428911 is a deficient number, since it is larger than the sum of its proper divisors (126641).

387428911 is a wasteful number, since it uses less digits than its factorization.

387428911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126640.

The product of its digits is 96768, while the sum is 43.

The square root of 387428911 is about 19683.2139398016. The cubic root of 387428911 is about 729.0052824547.

The spelling of 387428911 in words is "three hundred eighty-seven million, four hundred twenty-eight thousand, nine hundred eleven".