47157838 has 32 divisors (see below), whose sum is σ = 87869376. Its totient is φ = 18482688.

The previous prime is 47157823. The next prime is 47157839. The reversal of 47157838 is 83875174.

It is a junction number, because it is equal to n+sod(n) for n = 47157794 and 47157803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47157839) 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, 19420 + ... + 21712.

It is an arithmetic number, because the mean of its divisors is an integer number (2745918).

Almost surely, 2^47157838 is an apocalyptic number.

47157838 is a deficient number, since it is larger than the sum of its proper divisors (40711538).

47157838 is a wasteful number, since it uses less digits than its factorization.

47157838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2428.

The product of its digits is 188160, while the sum is 43.

The square root of 47157838 is about 6867.1564712041. The cubic root of 47157838 is about 361.2861352805.

The spelling of 47157838 in words is "forty-seven million, one hundred fifty-seven thousand, eight hundred thirty-eight".