40249439 has 8 divisors (see below), whose sum is σ = 42051072. Its totient is φ = 38479320.

The previous prime is 40249423. The next prime is 40249453. The reversal of 40249439 is 93494204.

40249439 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40249439 - 2⁴ = 40249423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40249399 and 40249408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40249459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5249 + ... + 10394.

It is an arithmetic number, because the mean of its divisors is an integer number (5256384).

Almost surely, 2^40249439 is an apocalyptic number.

40249439 is a deficient number, since it is larger than the sum of its proper divisors (1801633).

40249439 is a wasteful number, since it uses less digits than its factorization.

40249439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15757.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 40249439 is about 6344.2445570769. The cubic root of 40249439 is about 342.7046078840.

The spelling of 40249439 in words is "forty million, two hundred forty-nine thousand, four hundred thirty-nine".