142615638 has 24 divisors (see below), whose sum is σ = 337091976. Its totient is φ = 43216800.

The previous prime is 142615637. The next prime is 142615643. The reversal of 142615638 is 836516241.

It is a happy number.

142615638 is a `hidden beast` number, since 1 + 4 + 2 + 6 + 15 + 638 = 666.

142615638 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142615631) 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, 359943 + ... + 360338.

It is an arithmetic number, because the mean of its divisors is an integer number (14045499).

Almost surely, 2^142615638 is an apocalyptic number.

142615638 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

142615638 is an abundant number, since it is smaller than the sum of its proper divisors (194476338).

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

142615638 is a wasteful number, since it uses less digits than its factorization.

142615638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720300 (or 720297 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 142615638 is about 11942.1789469091. The cubic root of 142615638 is about 522.4632123852.

The spelling of 142615638 in words is "one hundred forty-two million, six hundred fifteen thousand, six hundred thirty-eight".