1020040040 has 16 divisors (see below), whose sum is σ = 2295090180. Its totient is φ = 408016000.

The previous prime is 1020040019. The next prime is 1020040057. The reversal of 1020040040 is 400400201.

1020040040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 986839396 + 33200644 = 31414^2 + 5762^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12750461 + ... + 12750540.

Almost surely, 2^1020040040 is an apocalyptic number.

1020040040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020040040 is an abundant number, since it is smaller than the sum of its proper divisors (1275050140).

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

1020040040 is a wasteful number, since it uses less digits than its factorization.

1020040040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25501012 (or 25501008 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 1020040040 is about 31938.0656897064. The cubic root of 1020040040 is about 1006.6358810130.

Adding to 1020040040 its reverse (400400201), we get a palindrome (1420440241).

The spelling of 1020040040 in words is "one billion, twenty million, forty thousand, forty".