40731625 has 24 divisors (see below), whose sum is σ = 55895112. Its totient is φ = 29612000.

The previous prime is 40731617. The next prime is 40731637. The reversal of 40731625 is 52613704.

It can be written as a sum of positive squares in 4 ways, for example, as 2650384 + 38081241 = 1628^2 + 6171^2 .

It is not a de Polignac number, because 40731625 - 2³ = 40731617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40731593 and 40731602.

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, 13779 + ... + 16471.

It is an arithmetic number, because the mean of its divisors is an integer number (2328963).

Almost surely, 2^40731625 is an apocalyptic number.

It is an amenable number.

40731625 is a deficient number, since it is larger than the sum of its proper divisors (15163487).

40731625 is a wasteful number, since it uses less digits than its factorization.

40731625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2730 (or 2709 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 40731625 is about 6382.1332640427. The cubic root of 40731625 is about 344.0677062738.

The spelling of 40731625 in words is "forty million, seven hundred thirty-one thousand, six hundred twenty-five".