142219840 has 112 divisors (see below), whose sum is σ = 390339072. Its totient is φ = 48347136.

The previous prime is 142219801. The next prime is 142219867. The reversal of 142219840 is 48912241.

It is a tau number, because it is divible by the number of its divisors (112).

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, 387337 + ... + 387703.

Almost surely, 2^142219840 is an apocalyptic number.

142219840 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 142219840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195169536).

142219840 is an abundant number, since it is smaller than the sum of its proper divisors (248119232).

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

142219840 is a wasteful number, since it uses less digits than its factorization.

142219840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564 (or 554 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 142219840 is about 11925.5960018776. The cubic root of 142219840 is about 521.9794377381.

The spelling of 142219840 in words is "one hundred forty-two million, two hundred nineteen thousand, eight hundred forty".