1423305123640 has 32 divisors (see below), whose sum is σ = 3202688710080. Its totient is φ = 569277217152.

The previous prime is 1423305123631. The next prime is 1423305123641. The reversal of 1423305123640 is 463215033241.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1423305123596 and 1423305123605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1423305123641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 884352 + ... + 1904911.

It is an arithmetic number, because the mean of its divisors is an integer number (100084022190).

Almost surely, 2^{1423305123640} is an apocalyptic number.

1423305123640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1423305123640 is an abundant number, since it is smaller than the sum of its proper divisors (1779383586440).

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

1423305123640 is a wasteful number, since it uses less digits than its factorization.

1423305123640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2802031 (or 2802027 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

The spelling of 1423305123640 in words is "one trillion, four hundred twenty-three billion, three hundred five million, one hundred twenty-three thousand, six hundred forty".