1023540320 has 48 divisors (see below), whose sum is σ = 2637947088. Its totient is φ = 372195840.

The previous prime is 1023540311. The next prime is 1023540347. The reversal of 1023540320 is 230453201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1023540292 and 1023540301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 289019 + ... + 292538.

It is an arithmetic number, because the mean of its divisors is an integer number (54957231).

Almost surely, 2^1023540320 is an apocalyptic number.

1023540320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1023540320 is an abundant number, since it is smaller than the sum of its proper divisors (1614406768).

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

1023540320 is a wasteful number, since it uses less digits than its factorization.

1023540320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581583 (or 581575 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 1023540320 is about 31992.8166937517. The cubic root of 1023540320 is about 1007.7859942928.

Adding to 1023540320 its reverse (230453201), we get a palindrome (1253993521).

The spelling of 1023540320 in words is "one billion, twenty-three million, five hundred forty thousand, three hundred twenty".