1423581432 has 128 divisors (see below), whose sum is σ = 4391439360. Its totient is φ = 374492160.

The previous prime is 1423581413. The next prime is 1423581463. The reversal of 1423581432 is 2341853241.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1423581393 and 1423581402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1377588 + ... + 1378620.

It is an arithmetic number, because the mean of its divisors is an integer number (34308120).

Almost surely, 2^1423581432 is an apocalyptic number.

1423581432 is a gapful number since it is divisible by the number (12) 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 1423581432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2195719680).

1423581432 is an abundant number, since it is smaller than the sum of its proper divisors (2967857928).

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

1423581432 is a wasteful number, since it uses less digits than its factorization.

1423581432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1693 (or 1689 counting only the distinct ones).

The product of its digits is 23040, while the sum is 33.

The square root of 1423581432 is about 37730.3781057121. The cubic root of 1423581432 is about 1124.9350236053.

Subtracting 1423581432 from its reverse (2341853241), we obtain a square (918271809 = 30303²).

The spelling of 1423581432 in words is "one billion, four hundred twenty-three million, five hundred eighty-one thousand, four hundred thirty-two".