1020423144 has 64 divisors (see below), whose sum is σ = 2751920640. Its totient is φ = 313447680.

The previous prime is 1020423143. The next prime is 1020423149. The reversal of 1020423144 is 4413240201.

It is a self number, because there is not a number n which added to its sum of digits gives 1020423144.

It is not an unprimeable number, because it can be changed into a prime (1020423143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208809 + ... + 213639.

It is an arithmetic number, because the mean of its divisors is an integer number (42998760).

Almost surely, 2^1020423144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1020423144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1375960320).

1020423144 is an abundant number, since it is smaller than the sum of its proper divisors (1731497496).

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

1020423144 is a wasteful number, since it uses less digits than its factorization.

1020423144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5530 (or 5526 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1020423144 is about 31944.0627347243. The cubic root of 1020423144 is about 1006.7618884727.

Adding to 1020423144 its reverse (4413240201), we get a palindrome (5433663345).

The spelling of 1020423144 in words is "one billion, twenty million, four hundred twenty-three thousand, one hundred forty-four".