405239320 has 16 divisors (see below), whose sum is σ = 911788560. Its totient is φ = 162095712.

The previous prime is 405239309. The next prime is 405239321. The reversal of 405239320 is 23932504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405239321) 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 3 ways as a sum of consecutive naturals, for example, 5065452 + ... + 5065531.

It is an arithmetic number, because the mean of its divisors is an integer number (56986785).

Almost surely, 2^405239320 is an apocalyptic number.

405239320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

405239320 is an abundant number, since it is smaller than the sum of its proper divisors (506549240).

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

405239320 is a wasteful number, since it uses less digits than its factorization.

405239320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10130994 (or 10130990 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 405239320 is about 20130.5568725756. The cubic root of 405239320 is about 740.0093254242.

The spelling of 405239320 in words is "four hundred five million, two hundred thirty-nine thousand, three hundred twenty".