1000254440 has 16 divisors (see below), whose sum is σ = 2250572580. Its totient is φ = 400101760.

The previous prime is 1000254439. The next prime is 1000254481. The reversal of 1000254440 is 444520001.

It can be written as a sum of positive squares in 2 ways, for example, as 999697924 + 556516 = 31618^2 + 746^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12503141 + ... + 12503220.

Almost surely, 2^1000254440 is an apocalyptic number.

1000254440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000254440 is an abundant number, since it is smaller than the sum of its proper divisors (1250318140).

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

1000254440 is a wasteful number, since it uses less digits than its factorization.

1000254440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25006372 (or 25006368 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 1000254440 is about 31626.7993954494. The cubic root of 1000254440 is about 1000.0848061410.

Adding to 1000254440 its reverse (444520001), we get a palindrome (1444774441).

The spelling of 1000254440 in words is "one billion, two hundred fifty-four thousand, four hundred forty".