1005381954 has 12 divisors (see below), whose sum is σ = 2178327606. Its totient is φ = 335127312.

The previous prime is 1005381929. The next prime is 1005382039. The reversal of 1005381954 is 4591835001.

1005381954 is a `hidden beast` number, since 100 + 538 + 19 + 5 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 919726929 + 85655025 = 30327^2 + 9255^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27927259 + ... + 27927294.

Almost surely, 2^1005381954 is an apocalyptic number.

1005381954 is an abundant number, since it is smaller than the sum of its proper divisors (1172945652).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1005381954 is a wasteful number, since it uses less digits than its factorization.

1005381954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55854561 (or 55854558 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 1005381954 is about 31707.7585773577. The cubic root of 1005381954 is about 1001.7907758742.

The spelling of 1005381954 in words is "one billion, five million, three hundred eighty-one thousand, nine hundred fifty-four".