142897440 has 192 divisors, whose sum is σ = 522547200. Its totient is φ = 32148480.

The previous prime is 142897379. The next prime is 142897451. The reversal of 142897440 is 44798241.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 238261 + ... + 238859.

It is an arithmetic number, because the mean of its divisors is an integer number (2721600).

Almost surely, 2^142897440 is an apocalyptic number.

142897440 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 142897440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261273600).

142897440 is an abundant number, since it is smaller than the sum of its proper divisors (379649760).

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

142897440 is a wasteful number, since it uses less digits than its factorization.

142897440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695 (or 687 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 142897440 is about 11953.9717249122. The cubic root of 142897440 is about 522.8071071420.

The spelling of 142897440 in words is "one hundred forty-two million, eight hundred ninety-seven thousand, four hundred forty".