381188870 has 16 divisors (see below), whose sum is σ = 686476080. Its totient is φ = 152400864.

The previous prime is 381188839. The next prime is 381188881. The reversal of 381188870 is 78881183.

It is a super-2 number, since 2×381188870² = 290609909223753800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15161 + ... + 31499.

It is an arithmetic number, because the mean of its divisors is an integer number (42904755).

Almost surely, 2^381188870 is an apocalyptic number.

381188870 is a deficient number, since it is larger than the sum of its proper divisors (305287210).

381188870 is a wasteful number, since it uses less digits than its factorization.

381188870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18679.

The product of its (nonzero) digits is 86016, while the sum is 44.

The square root of 381188870 is about 19524.0587481189. The cubic root of 381188870 is about 725.0702238756.

The spelling of 381188870 in words is "three hundred eighty-one million, one hundred eighty-eight thousand, eight hundred seventy".