40309352 has 16 divisors (see below), whose sum is σ = 75966660. Its totient is φ = 20051584.

The previous prime is 40309351. The next prime is 40309421. The reversal of 40309352 is 25390304.

It can be written as a sum of positive squares in 2 ways, for example, as 40271716 + 37636 = 6346^2 + 194^2 .

It is not an unprimeable number, because it can be changed into a prime (40309351) by changing a digit.

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, 11213 + ... + 14364.

Almost surely, 2^40309352 is an apocalyptic number.

It is an amenable number.

40309352 is a deficient number, since it is larger than the sum of its proper divisors (35657308).

40309352 is a wasteful number, since it uses less digits than its factorization.

40309352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25780 (or 25776 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 40309352 is about 6348.9646400023. The cubic root of 40309352 is about 342.8745670378.

Adding to 40309352 its reverse (25390304), we get a palindrome (65699656).

The spelling of 40309352 in words is "forty million, three hundred nine thousand, three hundred fifty-two".