142687440 has 160 divisors (see below), whose sum is σ = 561749760. Its totient is φ = 32610816.

The previous prime is 142687417. The next prime is 142687481. The reversal of 142687440 is 44786241.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 142687395 and 142687404.

It is a congruent number.

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, 10402 + ... + 19838.

It is an arithmetic number, because the mean of its divisors is an integer number (3510936).

Almost surely, 2^142687440 is an apocalyptic number.

142687440 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 142687440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280874880).

142687440 is an abundant number, since it is smaller than the sum of its proper divisors (419062320).

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

142687440 is a wasteful number, since it uses less digits than its factorization.

142687440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9466 (or 9454 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 142687440 is about 11945.1848039283. The cubic root of 142687440 is about 522.5508783434.

The spelling of 142687440 in words is "one hundred forty-two million, six hundred eighty-seven thousand, four hundred forty".