142304240 has 80 divisors (see below), whose sum is σ = 358289568. Its totient is φ = 52251648.

The previous prime is 142304237. The next prime is 142304249. The reversal of 142304240 is 42403241.

It is a tau number, because it is divible by the number of its divisors (80).

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 (142304249) 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, 304487 + ... + 304953.

Almost surely, 2^142304240 is an apocalyptic number.

142304240 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 142304240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179144784).

142304240 is an abundant number, since it is smaller than the sum of its proper divisors (215985328).

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

142304240 is a wasteful number, since it uses less digits than its factorization.

142304240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786 (or 780 counting only the distinct ones).

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

The square root of 142304240 is about 11929.1340842494. The cubic root of 142304240 is about 522.0826731063.

Adding to 142304240 its reverse (42403241), we get a palindrome (184707481).

Subtracting from 142304240 its reverse (42403241), we obtain a palindrome (99900999).

The spelling of 142304240 in words is "one hundred forty-two million, three hundred four thousand, two hundred forty".