405012320 has 48 divisors (see below), whose sum is σ = 971148528. Its totient is φ = 159582720.

The previous prime is 405012317. The next prime is 405012371. The reversal of 405012320 is 23210504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8171 + ... + 29610.

It is an arithmetic number, because the mean of its divisors is an integer number (20232261).

Almost surely, 2^405012320 is an apocalyptic number.

405012320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

405012320 is an abundant number, since it is smaller than the sum of its proper divisors (566136208).

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

405012320 is a wasteful number, since it uses less digits than its factorization.

405012320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37863 (or 37855 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 405012320 is about 20124.9178880312. The cubic root of 405012320 is about 739.8711243793.

Adding to 405012320 its reverse (23210504), we get a palindrome (428222824).

The spelling of 405012320 in words is "four hundred five million, twelve thousand, three hundred twenty".