1010020040 has 16 divisors (see below), whose sum is σ = 2272545180. Its totient is φ = 404008000.

The previous prime is 1010020027. The next prime is 1010020061. The reversal of 1010020040 is 400200101.

It can be written as a sum of positive squares in 2 ways, for example, as 1009587076 + 432964 = 31774^2 + 658^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

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, 12625211 + ... + 12625290.

Almost surely, 2^1010020040 is an apocalyptic number.

1010020040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1010020040 is an abundant number, since it is smaller than the sum of its proper divisors (1262525140).

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

1010020040 is a wasteful number, since it uses less digits than its factorization.

1010020040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25250512 (or 25250508 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 1010020040 is about 31780.8124502820. The cubic root of 1010020040 is about 1003.3289193327.

Adding to 1010020040 its reverse (400200101), we get a palindrome (1410220141).

The spelling of 1010020040 in words is "one billion, ten million, twenty thousand, forty".