40638501 has 12 divisors (see below), whose sum is σ = 58912620. Its totient is φ = 26994240.

The previous prime is 40638491. The next prime is 40638523. The reversal of 40638501 is 10583604.

It can be written as a sum of positive squares in 2 ways, for example, as 18792225 + 21846276 = 4335^2 + 4674^2 .

It is not a de Polignac number, because 40638501 - 2⁷ = 40638373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40638571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5506 + ... + 10563.

It is an arithmetic number, because the mean of its divisors is an integer number (4909385).

Almost surely, 2^40638501 is an apocalyptic number.

It is an amenable number.

40638501 is a deficient number, since it is larger than the sum of its proper divisors (18274119).

40638501 is a wasteful number, since it uses less digits than its factorization.

40638501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16356 (or 16353 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 40638501 is about 6374.8334095880. The cubic root of 40638501 is about 343.8052942015.

The spelling of 40638501 in words is "forty million, six hundred thirty-eight thousand, five hundred one".