10381985 has 16 divisors (see below), whose sum is σ = 13395456. Its totient is φ = 7696128.

The previous prime is 10381957. The next prime is 10381991. The reversal of 10381985 is 58918301.

10381985 = 536² + 537² + ... + 569².

10381985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 10381985 - 2⁸ = 10381729 is a prime.

It is a super-2 number, since 2×10381985² = 215571225080450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4784 + ... + 6606.

It is an arithmetic number, because the mean of its divisors is an integer number (837216).

Almost surely, 2^10381985 is an apocalyptic number.

It is an amenable number.

10381985 is a deficient number, since it is larger than the sum of its proper divisors (3013471).

10381985 is a wasteful number, since it uses less digits than its factorization.

10381985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 10381985 is about 3222.1087815280. The cubic root of 10381985 is about 218.1524688794.

The spelling of 10381985 in words is "ten million, three hundred eighty-one thousand, nine hundred eighty-five".