1423433440 has 96 divisors (see below), whose sum is σ = 3950837856. Its totient is φ = 477788160.

The previous prime is 1423433381. The next prime is 1423433461. The reversal of 1423433440 is 443343241.

It is a super-2 number, since 2×1423433440² = 4052325516220467200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1423433399 and 1423433408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8227 + ... + 53986.

It is an arithmetic number, because the mean of its divisors is an integer number (41154561).

Almost surely, 2^1423433440 is an apocalyptic number.

1423433440 is a gapful number since it is divisible by the number (10) 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 1423433440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1975418928).

1423433440 is an abundant number, since it is smaller than the sum of its proper divisors (2527404416).

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

1423433440 is a wasteful number, since it uses less digits than its factorization.

1423433440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62252 (or 62244 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

The square root of 1423433440 is about 37728.4168764076. The cubic root of 1423433440 is about 1124.8960404347.

Adding to 1423433440 its reverse (443343241), we get a palindrome (1866776681).

It can be divided in two parts, 14234 and 33440, that added together give a palindrome (47674).

The spelling of 1423433440 in words is "one billion, four hundred twenty-three million, four hundred thirty-three thousand, four hundred forty".