47440839 has 16 divisors (see below), whose sum is σ = 65923200. Its totient is φ = 30309216.

The previous prime is 47440837. The next prime is 47440849. The reversal of 47440839 is 93804474.

It is not a de Polignac number, because 47440839 - 2¹ = 47440837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 47440797 and 47440806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47440837) 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, 10132 + ... + 14054.

It is an arithmetic number, because the mean of its divisors is an integer number (4120200).

Almost surely, 2^47440839 is an apocalyptic number.

47440839 is a deficient number, since it is larger than the sum of its proper divisors (18482361).

47440839 is a wasteful number, since it uses less digits than its factorization.

47440839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4094.

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 47440839 is about 6887.7310487562. The cubic root of 47440839 is about 362.0074044862.

Subtracting 47440839 from its reverse (93804474), we obtain a triangular number (46363635 = T₉₆₂₉).

The spelling of 47440839 in words is "forty-seven million, four hundred forty thousand, eight hundred thirty-nine".