24139287 has 6 divisors (see below), whose sum is σ = 34867872. Its totient is φ = 16092852.

The previous prime is 24139279. The next prime is 24139289. The reversal of 24139287 is 78293142.

It is not a de Polignac number, because 24139287 - 2³ = 24139279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24139289) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1341063 + ... + 1341080.

It is an arithmetic number, because the mean of its divisors is an integer number (5811312).

Almost surely, 2^24139287 is an apocalyptic number.

24139287 is a deficient number, since it is larger than the sum of its proper divisors (10728585).

24139287 is a wasteful number, since it uses less digits than its factorization.

24139287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2682149 (or 2682146 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 24139287 is about 4913.1748391442. The cubic root of 24139287 is about 289.0068563964.

The spelling of 24139287 in words is "twenty-four million, one hundred thirty-nine thousand, two hundred eighty-seven".