142856640 has 84 divisors (see below), whose sum is σ = 491377224. Its totient is φ = 38094336.

The previous prime is 142856633. The next prime is 142856647. The reversal of 142856640 is 46658241.

142856640 is a `hidden beast` number, since 1 + 4 + 2 + 8 + 5 + 6 + 640 = 666.

142856640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (142856633) and next prime (142856647).

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 = 142856595 and 142856604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142856647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21922 + ... + 27681.

Almost surely, 2^142856640 is an apocalyptic number.

142856640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142856640 is an abundant number, since it is smaller than the sum of its proper divisors (348520584).

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

142856640 is a wasteful number, since it uses less digits than its factorization.

142856640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49626 (or 49613 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 142856640 is about 11952.2650573019. The cubic root of 142856640 is about 522.7573452047.

The spelling of 142856640 in words is "one hundred forty-two million, eight hundred fifty-six thousand, six hundred forty".