142747938 has 24 divisors (see below), whose sum is σ = 309582000. Its totient is φ = 47537304.

The previous prime is 142747909. The next prime is 142747981. The reversal of 142747938 is 839747241.

142747938 is a `hidden beast` number, since 142 + 7 + 479 + 38 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 142747893 and 142747902.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19513 + ... + 25811.

It is an arithmetic number, because the mean of its divisors is an integer number (12899250).

Almost surely, 2^142747938 is an apocalyptic number.

142747938 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

142747938 is an abundant number, since it is smaller than the sum of its proper divisors (166834062).

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

142747938 is a wasteful number, since it uses less digits than its factorization.

142747938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7566 (or 7563 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 142747938 is about 11947.7168530226. The cubic root of 142747938 is about 522.6247199658.

The spelling of 142747938 in words is "one hundred forty-two million, seven hundred forty-seven thousand, nine hundred thirty-eight".