1423185500 has 96 divisors (see below), whose sum is σ = 3569529600. Its totient is φ = 490248000.

The previous prime is 1423185499. The next prime is 1423185509. The reversal of 1423185500 is 55813241.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1423185509) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97691 + ... + 111309.

It is an arithmetic number, because the mean of its divisors is an integer number (37182600).

Almost surely, 2^1423185500 is an apocalyptic number.

1423185500 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 1423185500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1784764800).

1423185500 is an abundant number, since it is smaller than the sum of its proper divisors (2146344100).

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

1423185500 is a wasteful number, since it uses less digits than its factorization.

1423185500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13668 (or 13656 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 1423185500 is about 37725.1308811514. The cubic root of 1423185500 is about 1124.8307235018.

Adding to 1423185500 its reverse (55813241), we get a palindrome (1478998741).

The spelling of 1423185500 in words is "one billion, four hundred twenty-three million, one hundred eighty-five thousand, five hundred".