47840240 has 40 divisors (see below), whose sum is σ = 127119840. Its totient is φ = 16402176.

The previous prime is 47840239. The next prime is 47840249. The reversal of 47840240 is 4204874.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47840249) 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 7 ways as a sum of consecutive naturals, for example, 42155 + ... + 43274.

It is an arithmetic number, because the mean of its divisors is an integer number (3177996).

Almost surely, 2^47840240 is an apocalyptic number.

47840240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47840240 is an abundant number, since it is smaller than the sum of its proper divisors (79279600).

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

47840240 is a wasteful number, since it uses less digits than its factorization.

47840240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85449 (or 85443 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 29.

The square root of 47840240 is about 6916.6639357424. The cubic root of 47840240 is about 363.0204715414.

The spelling of 47840240 in words is "forty-seven million, eight hundred forty thousand, two hundred forty".