142885640 has 32 divisors (see below), whose sum is σ = 328337280. Its totient is φ = 55937472.

The previous prime is 142885621. The next prime is 142885651. The reversal of 142885640 is 46588241.

It is a happy number.

It is a super-2 number, since 2×142885640² = 40832612236419200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 142885594 and 142885603.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36122 + ... + 39881.

It is an arithmetic number, because the mean of its divisors is an integer number (10260540).

Almost surely, 2^142885640 is an apocalyptic number.

142885640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142885640 is an abundant number, since it is smaller than the sum of its proper divisors (185451640).

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

142885640 is a wasteful number, since it uses less digits than its factorization.

142885640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76061 (or 76057 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 38.

The square root of 142885640 is about 11953.4781549137. The cubic root of 142885640 is about 522.7927161829.

The spelling of 142885640 in words is "one hundred forty-two million, eight hundred eighty-five thousand, six hundred forty".