47990439 has 24 divisors (see below), whose sum is σ = 83884320. Its totient is φ = 25809408.

The previous prime is 47990417. The next prime is 47990461. The reversal of 47990439 is 93409974.

It is an interprime number because it is at equal distance from previous prime (47990417) and next prime (47990461).

It is not a de Polignac number, because 47990439 - 2⁸ = 47990183 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 47990394 and 47990403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47990039) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21334 + ... + 23475.

It is an arithmetic number, because the mean of its divisors is an integer number (3495180).

Almost surely, 2^47990439 is an apocalyptic number.

47990439 is a deficient number, since it is larger than the sum of its proper divisors (35893881).

47990439 is a wasteful number, since it uses less digits than its factorization.

47990439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44839 (or 44836 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 47990439 is about 6927.5131901715. The cubic root of 47990439 is about 363.3999871169.

The spelling of 47990439 in words is "forty-seven million, nine hundred ninety thousand, four hundred thirty-nine".