1423403220 has 96 divisors (see below), whose sum is σ = 4050144000. Its totient is φ = 373469184.

The previous prime is 1423403213. The next prime is 1423403239. The reversal of 1423403220 is 223043241.

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, 1157566 + ... + 1158794.

It is an arithmetic number, because the mean of its divisors is an integer number (42189000).

Almost surely, 2^1423403220 is an apocalyptic number.

1423403220 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 1423403220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2025072000).

1423403220 is an abundant number, since it is smaller than the sum of its proper divisors (2626740780).

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

1423403220 is a wasteful number, since it uses less digits than its factorization.

1423403220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1537 (or 1535 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 1423403220 is about 37728.0163804036. The cubic root of 1423403220 is about 1124.8880797302. Note that the first 3 decimals are identical.

Adding to 1423403220 its reverse (223043241), we get a palindrome (1646446461).

The spelling of 1423403220 in words is "one billion, four hundred twenty-three million, four hundred three thousand, two hundred twenty".