142320440 has 16 divisors (see below), whose sum is σ = 320221080. Its totient is φ = 56928160.

The previous prime is 142320421. The next prime is 142320443. The reversal of 142320440 is 44023241.

142320440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142320443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1778966 + ... + 1779045.

Almost surely, 2^142320440 is an apocalyptic number.

142320440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142320440 is an abundant number, since it is smaller than the sum of its proper divisors (177900640).

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

142320440 is a wasteful number, since it uses less digits than its factorization.

142320440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3558022 (or 3558018 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 142320440 is about 11929.8130748139. The cubic root of 142320440 is about 522.1024837560.

Adding to 142320440 its reverse (44023241), we get a palindrome (186343681).

The spelling of 142320440 in words is "one hundred forty-two million, three hundred twenty thousand, four hundred forty".