40018625 has 8 divisors (see below), whose sum is σ = 49943400. Its totient is φ = 32014800.

The previous prime is 40018621. The next prime is 40018639. The reversal of 40018625 is 52681004.

It can be written as a sum of positive squares in 4 ways, for example, as 8254129 + 31764496 = 2873^2 + 5636^2 .

It is not a de Polignac number, because 40018625 - 2² = 40018621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40018594 and 40018603.

It is not an unprimeable number, because it can be changed into a prime (40018621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159950 + ... + 160199.

It is an arithmetic number, because the mean of its divisors is an integer number (6242925).

Almost surely, 2^40018625 is an apocalyptic number.

It is an amenable number.

40018625 is a deficient number, since it is larger than the sum of its proper divisors (9924775).

40018625 is an equidigital number, since it uses as much as digits as its factorization.

40018625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320164 (or 320154 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 40018625 is about 6326.0275845115. The cubic root of 40018625 is about 342.0482616023.

Adding to 40018625 its reverse (52681004), we get a palindrome (92699629).

The spelling of 40018625 in words is "forty million, eighteen thousand, six hundred twenty-five".