423571440 has 40 divisors (see below), whose sum is σ = 1313072208. Its totient is φ = 112952320.

The previous prime is 423571433. The next prime is 423571441. The reversal of 423571440 is 44175324.

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

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 423571398 and 423571407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423571441) 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, 882201 + ... + 882680.

Almost surely, 2^423571440 is an apocalyptic number.

423571440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

423571440 is an abundant number, since it is smaller than the sum of its proper divisors (889500768).

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

423571440 is a wasteful number, since it uses less digits than its factorization.

423571440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1764897 (or 1764891 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 423571440 is about 20580.8512943464. The cubic root of 423571440 is about 751.0039532819.

The spelling of 423571440 in words is "four hundred twenty-three million, five hundred seventy-one thousand, four hundred forty".