1020031090 has 32 divisors (see below), whose sum is σ = 1981966896. Its totient is φ = 375736320.

The previous prime is 1020031069. The next prime is 1020031091. The reversal of 1020031090 is 901300201.

1020031090 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 8 ways, for example, as 48399849 + 971631241 = 6957^2 + 31171^2 .

It is not an unprimeable number, because it can be changed into a prime (1020031091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47230 + ... + 65350.

Almost surely, 2^1020031090 is an apocalyptic number.

1020031090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1020031090 is a deficient number, since it is larger than the sum of its proper divisors (961935806).

1020031090 is a wasteful number, since it uses less digits than its factorization.

1020031090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18574.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1020031090 is about 31937.9255744640. The cubic root of 1020031090 is about 1006.6329368745.

Adding to 1020031090 its reverse (901300201), we get a palindrome (1921331291).

The spelling of 1020031090 in words is "one billion, twenty million, thirty-one thousand, ninety".