1023131235440 has 40 divisors (see below), whose sum is σ = 2518708368240. Its totient is φ = 385178817536.

The previous prime is 1023131235439. The next prime is 1023131235541. The reversal of 1023131235440 is 445321313201.

It is a tau number, because it is divible by the number of its divisors (40).

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, 376149830 + ... + 376152549.

It is an arithmetic number, because the mean of its divisors is an integer number (62967709206).

Almost surely, 2^{1023131235440} is an apocalyptic number.

1023131235440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1023131235440 is an abundant number, since it is smaller than the sum of its proper divisors (1495577132800).

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

1023131235440 is a wasteful number, since it uses less digits than its factorization.

1023131235440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752302409 (or 752302403 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 1023131235440 its reverse (445321313201), we get a palindrome (1468452548641).

The spelling of 1023131235440 in words is "one trillion, twenty-three billion, one hundred thirty-one million, two hundred thirty-five thousand, four hundred forty".