40409304 has 32 divisors (see below), whose sum is σ = 108795120. Its totient is φ = 12433536.

The previous prime is 40409279. The next prime is 40409309. The reversal of 40409304 is 40390404.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40409309) 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 7 ways as a sum of consecutive naturals, for example, 64447 + ... + 65070.

Almost surely, 2^40409304 is an apocalyptic number.

It is an amenable number.

40409304 is an abundant number, since it is smaller than the sum of its proper divisors (68385816).

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

40409304 is a wasteful number, since it uses less digits than its factorization.

40409304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129539 (or 129535 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 40409304 is about 6356.8312861047. The cubic root of 40409304 is about 343.1577330162.

Adding to 40409304 its reverse (40390404), we get a palindrome (80799708).

The spelling of 40409304 in words is "forty million, four hundred nine thousand, three hundred four".