381858872 has 8 divisors (see below), whose sum is σ = 715985400. Its totient is φ = 190929432.

The previous prime is 381858853. The next prime is 381858887. The reversal of 381858872 is 278858183.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×381858872² = 291632396250224768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 381858872.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23866172 + ... + 23866187.

It is an arithmetic number, because the mean of its divisors is an integer number (89498175).

Almost surely, 2^381858872 is an apocalyptic number.

It is an amenable number.

381858872 is a deficient number, since it is larger than the sum of its proper divisors (334126528).

381858872 is a wasteful number, since it uses less digits than its factorization.

381858872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47732365 (or 47732361 counting only the distinct ones).

The product of its digits is 860160, while the sum is 50.

The square root of 381858872 is about 19541.2095838513. The cubic root of 381858872 is about 725.4947851998.

The spelling of 381858872 in words is "three hundred eighty-one million, eight hundred fifty-eight thousand, eight hundred seventy-two".