47143845 has 48 divisors (see below), whose sum is σ = 98317440. Its totient is φ = 20414592.

The previous prime is 47143829. The next prime is 47143847. The reversal of 47143845 is 54834174.

It is not a de Polignac number, because 47143845 - 2⁴ = 47143829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47143847) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2047 + ... + 9923.

It is an arithmetic number, because the mean of its divisors is an integer number (2048280).

Almost surely, 2^47143845 is an apocalyptic number.

47143845 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

47143845 is an abundant number, since it is smaller than the sum of its proper divisors (51173595).

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

47143845 is a wasteful number, since it uses less digits than its factorization.

47143845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7914 (or 7911 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 47143845 is about 6866.1375605212. The cubic root of 47143845 is about 361.2503973048.

The spelling of 47143845 in words is "forty-seven million, one hundred forty-three thousand, eight hundred forty-five".