142163640 has 128 divisors (see below), whose sum is σ = 477792000. Its totient is φ = 37597824.

The previous prime is 142163617. The next prime is 142163663. The reversal of 142163640 is 46361241.

142163640 is a `hidden beast` number, since 1 + 4 + 2 + 16 + 3 + 640 = 666.

142163640 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 (142163617) and next prime (142163663).

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 149647 + ... + 150593.

It is an arithmetic number, because the mean of its divisors is an integer number (3732750).

Almost surely, 2^142163640 is an apocalyptic number.

142163640 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 142163640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238896000).

142163640 is an abundant number, since it is smaller than the sum of its proper divisors (335628360).

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

142163640 is a wasteful number, since it uses less digits than its factorization.

142163640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106 (or 1096 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 142163640 is about 11923.2394926882. The cubic root of 142163640 is about 521.9106730488.

The spelling of 142163640 in words is "one hundred forty-two million, one hundred sixty-three thousand, six hundred forty".