1020200238 has 16 divisors (see below), whose sum is σ = 2267111760. Its totient is φ = 340066728.

The previous prime is 1020200221. The next prime is 1020200239. The reversal of 1020200238 is 8320020201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1020200238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020200239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9446245 + ... + 9446352.

It is an arithmetic number, because the mean of its divisors is an integer number (141694485).

Almost surely, 2^1020200238 is an apocalyptic number.

1020200238 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1020200238 is an abundant number, since it is smaller than the sum of its proper divisors (1246911522).

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

1020200238 is a wasteful number, since it uses less digits than its factorization.

1020200238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18892608 (or 18892602 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1020200238 is about 31940.5735389958. The cubic root of 1020200238 is about 1006.6885758770.

Adding to 1020200238 its reverse (8320020201), we get a palindrome (9340220439).

The spelling of 1020200238 in words is "one billion, twenty million, two hundred thousand, two hundred thirty-eight".