1023205320 has 48 divisors (see below), whose sum is σ = 3325418460. Its totient is φ = 272854656.

The previous prime is 1023205319. The next prime is 1023205331. The reversal of 1023205320 is 235023201.

1023205320 is a `hidden beast` number, since 102 + 32 + 0 + 532 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1023104196 + 101124 = 31986^2 + 318^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1023205293 and 1023205302.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1420759 + ... + 1421478.

Almost surely, 2^1023205320 is an apocalyptic number.

1023205320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1023205320 is an abundant number, since it is smaller than the sum of its proper divisors (2302213140).

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

1023205320 is a wasteful number, since it uses less digits than its factorization.

1023205320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2842254 (or 2842247 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 1023205320 is about 31987.5807150213. The cubic root of 1023205320 is about 1007.6760344014.

Adding to 1023205320 its reverse (235023201), we get a palindrome (1258228521).

The spelling of 1023205320 in words is "one billion, twenty-three million, two hundred five thousand, three hundred twenty".