40405330 has 16 divisors (see below), whose sum is σ = 83119680. Its totient is φ = 13853232.

The previous prime is 40405237. The next prime is 40405331. The reversal of 40405330 is 3350404.

It is a junction number, because it is equal to n+sod(n) for n = 40405298 and 40405307.

It is not an unprimeable number, because it can be changed into a prime (40405331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 288540 + ... + 288679.

It is an arithmetic number, because the mean of its divisors is an integer number (5194980).

Almost surely, 2^40405330 is an apocalyptic number.

40405330 is an abundant number, since it is smaller than the sum of its proper divisors (42714350).

40405330 is a wasteful number, since it uses less digits than its factorization.

40405330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577233.

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 40405330 is about 6356.5187013018. The cubic root of 40405330 is about 343.1464835150.

Adding to 40405330 its reverse (3350404), we get a palindrome (43755734).

The spelling of 40405330 in words is "forty million, four hundred five thousand, three hundred thirty".