383887885 has 4 divisors (see below), whose sum is σ = 460665468. Its totient is φ = 307110304.

The previous prime is 383887817. The next prime is 383887943. The reversal of 383887885 is 588788383.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 588788383 = 127 ⋅4636129.

It can be written as a sum of positive squares in 2 ways, for example, as 64979721 + 318908164 = 8061^2 + 17858^2 .

It is a cyclic number.

It is not a de Polignac number, because 383887885 - 2¹³ = 383879693 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38388784 + ... + 38388793.

It is an arithmetic number, because the mean of its divisors is an integer number (115166367).

Almost surely, 2^383887885 is an apocalyptic number.

It is an amenable number.

383887885 is a deficient number, since it is larger than the sum of its proper divisors (76777583).

383887885 is an equidigital number, since it uses as much as digits as its factorization.

383887885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76777582.

The product of its digits is 10321920, while the sum is 58.

The square root of 383887885 is about 19593.0570611122. The cubic root of 383887885 is about 726.7774918879. Note that the first 3 decimals are identical.

The spelling of 383887885 in words is "three hundred eighty-three million, eight hundred eighty-seven thousand, eight hundred eighty-five".