1000381646 has 8 divisors (see below), whose sum is σ = 1636988184. Its totient is φ = 454718920.

The previous prime is 1000381633. The next prime is 1000381649. The reversal of 1000381646 is 6461830001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000381649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22735925 + ... + 22735968.

It is an arithmetic number, because the mean of its divisors is an integer number (204623523).

Almost surely, 2^1000381646 is an apocalyptic number.

1000381646 is a deficient number, since it is larger than the sum of its proper divisors (636606538).

1000381646 is a wasteful number, since it uses less digits than its factorization.

1000381646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45471906.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 1000381646 is about 31628.8103791464. The cubic root of 1000381646 is about 1000.1271991530.

The spelling of 1000381646 in words is "one billion, three hundred eighty-one thousand, six hundred forty-six".