40309612 has 24 divisors (see below), whose sum is σ = 81826304. Its totient is φ = 17016912.

The previous prime is 40309589. The next prime is 40309637. The reversal of 40309612 is 21690304.

40309612 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8868 + ... + 12619.

Almost surely, 2^40309612 is an apocalyptic number.

It is an amenable number.

40309612 is an abundant number, since it is smaller than the sum of its proper divisors (41516692).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40309612 is a wasteful number, since it uses less digits than its factorization.

40309612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21565 (or 21563 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 40309612 is about 6348.9851157488. The cubic root of 40309612 is about 342.8753042298.

Adding to 40309612 its reverse (21690304), we get a palindrome (61999916).

The spelling of 40309612 in words is "forty million, three hundred nine thousand, six hundred twelve".