1040423985 has 24 divisors (see below), whose sum is σ = 1807349544. Its totient is φ = 553678080.

The previous prime is 1040423977. The next prime is 1040423999. The reversal of 1040423985 is 5893240401.

1040423985 is a `hidden beast` number, since 10 + 404 + 239 + 8 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 60233121 + 980190864 = 7761^2 + 31308^2 .

It is not a de Polignac number, because 1040423985 - 2³ = 1040423977 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4332 + ... + 45821.

It is an arithmetic number, because the mean of its divisors is an integer number (75306231).

Almost surely, 2^1040423985 is an apocalyptic number.

1040423985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1040423985 is a deficient number, since it is larger than the sum of its proper divisors (766925559).

1040423985 is a wasteful number, since it uses less digits than its factorization.

1040423985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50625 (or 50622 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 1040423985 is about 32255.6039317201. The cubic root of 1040423985 is about 1013.2970660088.

The spelling of 1040423985 in words is "one billion, forty million, four hundred twenty-three thousand, nine hundred eighty-five".