1023544240 has 20 divisors (see below), whose sum is σ = 2379740544. Its totient is φ = 409417664.

The previous prime is 1023544237. The next prime is 1023544253. The reversal of 1023544240 is 424453201.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×1023544240² = 2095285622474355200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6397072 + ... + 6397231.

Almost surely, 2^1023544240 is an apocalyptic number.

1023544240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1023544240 is an abundant number, since it is smaller than the sum of its proper divisors (1356196304).

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

1023544240 is a wasteful number, since it uses less digits than its factorization.

1023544240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12794316 (or 12794310 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 1023544240 is about 31992.8779574455. The cubic root of 1023544240 is about 1007.7872808456.

Adding to 1023544240 its reverse (424453201), we get a palindrome (1447997441).

The spelling of 1023544240 in words is "one billion, twenty-three million, five hundred forty-four thousand, two hundred forty".