381516879 has 16 divisors (see below), whose sum is σ = 523256960. Its totient is φ = 247082400.

The previous prime is 381516869. The next prime is 381516899. The reversal of 381516879 is 978615183.

It is not a de Polignac number, because 381516879 - 2¹² = 381512783 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381516829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79704 + ... + 84354.

It is an arithmetic number, because the mean of its divisors is an integer number (32703560).

Almost surely, 2^381516879 is an apocalyptic number.

381516879 is a deficient number, since it is larger than the sum of its proper divisors (141740081).

381516879 is a wasteful number, since it uses less digits than its factorization.

381516879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5430.

The product of its digits is 362880, while the sum is 48.

The square root of 381516879 is about 19532.4570651006. The cubic root of 381516879 is about 725.2781360103.

The spelling of 381516879 in words is "three hundred eighty-one million, five hundred sixteen thousand, eight hundred seventy-nine".