405239330 has 32 divisors (see below), whose sum is σ = 760415040. Its totient is φ = 155296960.

The previous prime is 405239321. The next prime is 405239333. The reversal of 405239330 is 33932504.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a junction number, because it is equal to n+sod(n) for n = 405239293 and 405239302.

It is not an unprimeable number, because it can be changed into a prime (405239333) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 32657 + ... + 43323.

It is an arithmetic number, because the mean of its divisors is an integer number (23762970).

Almost surely, 2^405239330 is an apocalyptic number.

405239330 is a deficient number, since it is larger than the sum of its proper divisors (355175710).

405239330 is a wasteful number, since it uses less digits than its factorization.

405239330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10834.

The product of its (nonzero) digits is 9720, while the sum is 29.

The square root of 405239330 is about 20130.5571209542. The cubic root of 405239330 is about 740.0093315113.

The spelling of 405239330 in words is "four hundred five million, two hundred thirty-nine thousand, three hundred thirty".