423890560 has 128 divisors (see below), whose sum is σ = 1056116160. Its totient is φ = 162570240.

The previous prime is 423890549. The next prime is 423890561. The reversal of 423890560 is 65098324.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×423890560² = 359366413714227200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (423890561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2008855 + ... + 2009065.

Almost surely, 2^423890560 is an apocalyptic number.

423890560 is a gapful number since it is divisible by the number (40) 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 423890560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (528058080).

423890560 is an abundant number, since it is smaller than the sum of its proper divisors (632225600).

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

423890560 is a wasteful number, since it uses less digits than its factorization.

423890560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346 (or 334 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 423890560 is about 20588.6026723525. The cubic root of 423890560 is about 751.1925088179.

The spelling of 423890560 in words is "four hundred twenty-three million, eight hundred ninety thousand, five hundred sixty".