1031020040 has 16 divisors (see below), whose sum is σ = 2319795180. Its totient is φ = 412408000.

The previous prime is 1031020033. The next prime is 1031020049. The reversal of 1031020040 is 400201301.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1030538404 + 481636 = 32102^2 + 694^2 .

It is not an unprimeable number, because it can be changed into a prime (1031020049) 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, 12887711 + ... + 12887790.

Almost surely, 2^1031020040 is an apocalyptic number.

1031020040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1031020040 is an abundant number, since it is smaller than the sum of its proper divisors (1288775140).

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

1031020040 is a wasteful number, since it uses less digits than its factorization.

1031020040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25775512 (or 25775508 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1031020040 is about 32109.5007746928. The cubic root of 1031020040 is about 1010.2349027199.

Adding to 1031020040 its reverse (400201301), we get a palindrome (1431221341).

The spelling of 1031020040 in words is "one billion, thirty-one million, twenty thousand, forty".