1023012440 has 64 divisors (see below), whose sum is σ = 2448079200. Its totient is φ = 383643648.

The previous prime is 1023012427. The next prime is 1023012449. The reversal of 1023012440 is 442103201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023012449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66782 + ... + 80658.

Almost surely, 2^1023012440 is an apocalyptic number.

1023012440 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 1023012440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1224039600).

1023012440 is an abundant number, since it is smaller than the sum of its proper divisors (1425066760).

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

1023012440 is a wasteful number, since it uses less digits than its factorization.

1023012440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14004 (or 14000 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1023012440 is about 31984.5656528270. The cubic root of 1023012440 is about 1007.6127128752.

Adding to 1023012440 its reverse (442103201), we get a palindrome (1465115641).

The spelling of 1023012440 in words is "one billion, twenty-three million, twelve thousand, four hundred forty".