142386640 has 80 divisors (see below), whose sum is σ = 363191040. Its totient is φ = 51484160.

The previous prime is 142386637. The next prime is 142386653. The reversal of 142386640 is 46683241.

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

It is a junction number, because it is equal to n+sod(n) for n = 142386596 and 142386605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 209982 + ... + 210658.

It is an arithmetic number, because the mean of its divisors is an integer number (4539888).

Almost surely, 2^142386640 is an apocalyptic number.

142386640 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 142386640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181595520).

142386640 is an abundant number, since it is smaller than the sum of its proper divisors (220804400).

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

142386640 is a wasteful number, since it uses less digits than its factorization.

142386640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940 (or 934 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 142386640 is about 11932.5873137388. The cubic root of 142386640 is about 522.1834227667.

The spelling of 142386640 in words is "one hundred forty-two million, three hundred eighty-six thousand, six hundred forty".