1023353400440 has 64 divisors (see below), whose sum is σ = 2642774247360. Its totient is φ = 349358146560.

The previous prime is 1023353400373. The next prime is 1023353400499. The reversal of 1023353400440 is 440043533201.

It is a super-2 number, since 2×1023353400440² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7777751 + ... + 7908230.

It is an arithmetic number, because the mean of its divisors is an integer number (41293347615).

Almost surely, 2^{1023353400440} is an apocalyptic number.

1023353400440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1023353400440 is an abundant number, since it is smaller than the sum of its proper divisors (1619420846920).

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

1023353400440 is a wasteful number, since it uses less digits than its factorization.

1023353400440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15686232 (or 15686228 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 29.

Adding to 1023353400440 its reverse (440043533201), we get a palindrome (1463396933641).

The spelling of 1023353400440 in words is "one trillion, twenty-three billion, three hundred fifty-three million, four hundred thousand, four hundred forty".