47858391 has 32 divisors (see below), whose sum is σ = 81536000. Its totient is φ = 27177120.

The previous prime is 47858351. The next prime is 47858399. The reversal of 47858391 is 19385874.

It is not a de Polignac number, because 47858391 - 2¹⁵ = 47825623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47858399) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33510 + ... + 34908.

It is an arithmetic number, because the mean of its divisors is an integer number (2548000).

Almost surely, 2^47858391 is an apocalyptic number.

47858391 is a deficient number, since it is larger than the sum of its proper divisors (33677609).

47858391 is a wasteful number, since it uses less digits than its factorization.

47858391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1596 (or 1590 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 47858391 is about 6917.9759323085. The cubic root of 47858391 is about 363.0663767697.

Adding to 47858391 its sum of digits (45), we get a triangular number (47858436 = T₉₇₈₃).

The spelling of 47858391 in words is "forty-seven million, eight hundred fifty-eight thousand, three hundred ninety-one".