142315440 has 80 divisors (see below), whose sum is σ = 448456416. Its totient is φ = 37324800.

The previous prime is 142315417. The next prime is 142315487. The reversal of 142315440 is 44513241.

142315440 = T₃₅₅ + T₃₅₆ + ... + T₉₆₄.

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 (24).

It is a self number, because there is not a number n which added to its sum of digits gives 142315440.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9780 + ... + 19500.

Almost surely, 2^142315440 is an apocalyptic number.

142315440 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 142315440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224228208).

142315440 is an abundant number, since it is smaller than the sum of its proper divisors (306140976).

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

142315440 is a wasteful number, since it uses less digits than its factorization.

142315440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9798 (or 9792 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 142315440 is about 11929.6035139480. The cubic root of 142315440 is about 522.0963695184.

Adding to 142315440 its reverse (44513241), we get a palindrome (186828681).

The spelling of 142315440 in words is "one hundred forty-two million, three hundred fifteen thousand, four hundred forty".