47840142 has 32 divisors (see below), whose sum is σ = 115782912. Its totient is φ = 12864384.

The previous prime is 47840141. The next prime is 47840179. The reversal of 47840142 is 24104874.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47840141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32788 + ... + 34215.

It is an arithmetic number, because the mean of its divisors is an integer number (3618216).

Almost surely, 2^47840142 is an apocalyptic number.

47840142 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

47840142 is an abundant number, since it is smaller than the sum of its proper divisors (67942770).

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

47840142 is a wasteful number, since it uses less digits than its factorization.

47840142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67032.

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 47840142 is about 6916.6568513987. The cubic root of 47840142 is about 363.0202236606.

The spelling of 47840142 in words is "forty-seven million, eight hundred forty thousand, one hundred forty-two".