1023133440 has 288 divisors, whose sum is σ = 3955875840. Its totient is φ = 220004352.

The previous prime is 1023133429. The next prime is 1023133469. The reversal of 1023133440 is 443313201.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 455841 + ... + 458079.

It is an arithmetic number, because the mean of its divisors is an integer number (13735680).

Almost surely, 2^1023133440 is an apocalyptic number.

1023133440 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 1023133440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1977937920).

1023133440 is an abundant number, since it is smaller than the sum of its proper divisors (2932742400).

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

1023133440 is a wasteful number, since it uses less digits than its factorization.

1023133440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2287 (or 2273 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 1023133440 is about 31986.4571342310. The cubic root of 1023133440 is about 1007.6524374920.

Adding to 1023133440 its reverse (443313201), we get a palindrome (1466446641).

The spelling of 1023133440 in words is "one billion, twenty-three million, one hundred thirty-three thousand, four hundred forty".