40635725 has 24 divisors (see below), whose sum is σ = 54866280. Its totient is φ = 29675520.

The previous prime is 40635713. The next prime is 40635743. The reversal of 40635725 is 52753604.

It can be written as a sum of positive squares in 12 ways, for example, as 12482089 + 28153636 = 3533^2 + 5306^2 .

It is a de Polignac number, because none of the positive numbers 2^k-40635725 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40635691 and 40635700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30881 + ... + 32169.

It is an arithmetic number, because the mean of its divisors is an integer number (2286095).

Almost surely, 2^40635725 is an apocalyptic number.

It is an amenable number.

40635725 is a deficient number, since it is larger than the sum of its proper divisors (14230555).

40635725 is a wasteful number, since it uses less digits than its factorization.

40635725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1409 (or 1404 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 32.

The square root of 40635725 is about 6374.6156746897. The cubic root of 40635725 is about 343.7974656219.

The spelling of 40635725 in words is "forty million, six hundred thirty-five thousand, seven hundred twenty-five".