40307252 has 12 divisors (see below), whose sum is σ = 70928676. Its totient is φ = 20041920.

The previous prime is 40307249. The next prime is 40307261. The reversal of 40307252 is 25270304.

It can be written as a sum of positive squares in 2 ways, for example, as 14945956 + 25361296 = 3866^2 + 5036^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27113 + ... + 28560.

It is an arithmetic number, because the mean of its divisors is an integer number (5910723).

Almost surely, 2^40307252 is an apocalyptic number.

It is an amenable number.

40307252 is a deficient number, since it is larger than the sum of its proper divisors (30621424).

40307252 is a wasteful number, since it uses less digits than its factorization.

40307252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55858 (or 55856 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 40307252 is about 6348.7992565524. The cubic root of 40307252 is about 342.8686126785.

Adding to 40307252 its reverse (25270304), we get a palindrome (65577556).

The spelling of 40307252 in words is "forty million, three hundred seven thousand, two hundred fifty-two".