423890643409728 has 448 divisors, whose sum is σ = 1352005079242752. Its totient is φ = 115621694341120.

The previous prime is 423890643409687. The next prime is 423890643409757. The reversal of 423890643409728 is 827904346098324.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5939886175 + ... + 5939957537.

Almost surely, 2^{423890643409728} is an apocalyptic number.

423890643409728 is a gapful number since it is divisible by the number (48) 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 423890643409728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (676002539621376).

423890643409728 is an abundant number, since it is smaller than the sum of its proper divisors (928114435833024).

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

423890643409728 is a wasteful number, since it uses less digits than its factorization.

423890643409728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78622 (or 78612 counting only the distinct ones).

The product of its (nonzero) digits is 501645312, while the sum is 69.

The spelling of 423890643409728 in words is "four hundred twenty-three trillion, eight hundred ninety billion, six hundred forty-three million, four hundred nine thousand, seven hundred twenty-eight".