47840385 has 16 divisors (see below), whose sum is σ = 80573760. Its totient is φ = 24171840.

The previous prime is 47840357. The next prime is 47840389. The reversal of 47840385 is 58304874.

It is not a de Polignac number, because 47840385 - 2⁷ = 47840257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47840389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83646 + ... + 84215.

It is an arithmetic number, because the mean of its divisors is an integer number (5035860).

Almost surely, 2^47840385 is an apocalyptic number.

It is an amenable number.

47840385 is a deficient number, since it is larger than the sum of its proper divisors (32733375).

47840385 is a wasteful number, since it uses less digits than its factorization.

47840385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167888.

The product of its (nonzero) digits is 107520, while the sum is 39.

The square root of 47840385 is about 6916.6744176663. The cubic root of 47840385 is about 363.0208383032.

The spelling of 47840385 in words is "forty-seven million, eight hundred forty thousand, three hundred eighty-five".