142440340 has 48 divisors (see below), whose sum is σ = 359856000. Its totient is φ = 46265472.

The previous prime is 142440323. The next prime is 142440349. The reversal of 142440340 is 43044241.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142440349) 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, 24115 + ... + 29434.

It is an arithmetic number, because the mean of its divisors is an integer number (7497000).

Almost surely, 2^142440340 is an apocalyptic number.

142440340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142440340 is an abundant number, since it is smaller than the sum of its proper divisors (217415660).

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

142440340 is a wasteful number, since it uses less digits than its factorization.

142440340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53584 (or 53582 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 142440340 is about 11934.8372422920. The cubic root of 142440340 is about 522.2490603044.

Adding to 142440340 its reverse (43044241), we get a palindrome (185484581).

The spelling of 142440340 in words is "one hundred forty-two million, four hundred forty thousand, three hundred forty".