1423232140 has 48 divisors (see below), whose sum is σ = 3265103520. Its totient is φ = 516807680.

The previous prime is 1423232117. The next prime is 1423232143. The reversal of 1423232140 is 412323241.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (1423232143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165876 + ... + 174244.

It is an arithmetic number, because the mean of its divisors is an integer number (68022990).

Almost surely, 2^1423232140 is an apocalyptic number.

1423232140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1423232140 is an abundant number, since it is smaller than the sum of its proper divisors (1841871380).

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

1423232140 is a wasteful number, since it uses less digits than its factorization.

1423232140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9162 (or 9160 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1423232140 is about 37725.7490316627. The cubic root of 1423232140 is about 1124.8430108510.

Adding to 1423232140 its reverse (412323241), we get a palindrome (1835555381).

The spelling of 1423232140 in words is "one billion, four hundred twenty-three million, two hundred thirty-two thousand, one hundred forty".