1023111420 has 96 divisors (see below), whose sum is σ = 2984034816. Its totient is φ = 261676800.

The previous prime is 1023111413. The next prime is 1023111421. The reversal of 1023111420 is 241113201.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1023111420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023111421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 154375 + ... + 160865.

It is an arithmetic number, because the mean of its divisors is an integer number (31083696).

Almost surely, 2^1023111420 is an apocalyptic number.

1023111420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1023111420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1492017408).

1023111420 is an abundant number, since it is smaller than the sum of its proper divisors (1960923396).

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

1023111420 is a wasteful number, since it uses less digits than its factorization.

1023111420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6611 (or 6609 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1023111420 is about 31986.1129242051. The cubic root of 1023111420 is about 1007.6452085015.

Adding to 1023111420 its reverse (241113201), we get a palindrome (1264224621).

The spelling of 1023111420 in words is "one billion, twenty-three million, one hundred eleven thousand, four hundred twenty".