40939245 has 12 divisors (see below), whose sum is σ = 70961436. Its totient is φ = 21834240.

The previous prime is 40939229. The next prime is 40939273. The reversal of 40939245 is 54293904.

40939245 is a `hidden beast` number, since 409 + 3 + 9 + 245 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8892324 + 32046921 = 2982^2 + 5661^2 .

It is not a de Polignac number, because 40939245 - 2⁴ = 40939229 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 454836 + ... + 454925.

It is an arithmetic number, because the mean of its divisors is an integer number (5913453).

Almost surely, 2^40939245 is an apocalyptic number.

40939245 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40939245 is a deficient number, since it is larger than the sum of its proper divisors (30022191).

40939245 is a wasteful number, since it uses less digits than its factorization.

40939245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909772 (or 909769 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 40939245 is about 6398.3783101658. The cubic root of 40939245 is about 344.6513175317.

The spelling of 40939245 in words is "forty million, nine hundred thirty-nine thousand, two hundred forty-five".