1023438840 has 32 divisors (see below), whose sum is σ = 3070316880. Its totient is φ = 272916992.

The previous prime is 1023438809. The next prime is 1023438863. The reversal of 1023438840 is 488343201.

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, 4264209 + ... + 4264448.

Almost surely, 2^1023438840 is an apocalyptic number.

1023438840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1023438840 is an abundant number, since it is smaller than the sum of its proper divisors (2046878040).

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

1023438840 is a wasteful number, since it uses less digits than its factorization.

1023438840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8528671 (or 8528667 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 1023438840 is about 31991.2306734205. The cubic root of 1023438840 is about 1007.7526871852.

The spelling of 1023438840 in words is "one billion, twenty-three million, four hundred thirty-eight thousand, eight hundred forty".