1012440040 has 16 divisors (see below), whose sum is σ = 2277990180. Its totient is φ = 404976000.

The previous prime is 1012440017. The next prime is 1012440041. The reversal of 1012440040 is 400442101.

It can be written as a sum of positive squares in 2 ways, for example, as 999950884 + 12489156 = 31622^2 + 3534^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1012439996 and 1012440023.

It is not an unprimeable number, because it can be changed into a prime (1012440041) 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, 12655461 + ... + 12655540.

Almost surely, 2^1012440040 is an apocalyptic number.

1012440040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1012440040 is an abundant number, since it is smaller than the sum of its proper divisors (1265550140).

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

1012440040 is a wasteful number, since it uses less digits than its factorization.

1012440040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25311012 (or 25311008 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 1012440040 is about 31818.8629589431. The cubic root of 1012440040 is about 1004.1296029050.

Adding to 1012440040 its reverse (400442101), we get a palindrome (1412882141).

The spelling of 1012440040 in words is "one billion, twelve million, four hundred forty thousand, forty".