40308725 has 12 divisors (see below), whose sum is σ = 51334884. Its totient is φ = 31374720.

The previous prime is 40308713. The next prime is 40308727. The reversal of 40308725 is 52780304.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 75076 + 40233649 = 274^2 + 6343^2 .

It is not a de Polignac number, because 40308725 - 2²⁴ = 23531509 is a prime.

It is a super-2 number, since 2×40308725² = 3249586622251250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40308727) 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, 20864 + ... + 22713.

It is an arithmetic number, because the mean of its divisors is an integer number (4277907).

Almost surely, 2^40308725 is an apocalyptic number.

It is an amenable number.

40308725 is a deficient number, since it is larger than the sum of its proper divisors (11026159).

40308725 is a wasteful number, since it uses less digits than its factorization.

40308725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43624 (or 43619 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 40308725 is about 6348.9152616805. The cubic root of 40308725 is about 342.8727892579.

The spelling of 40308725 in words is "forty million, three hundred eight thousand, seven hundred twenty-five".