405389928 has 64 divisors (see below), whose sum is σ = 1079769600. Its totient is φ = 126463680.

The previous prime is 405389923. The next prime is 405389953. The reversal of 405389928 is 829983504.

It is not an unprimeable number, because it can be changed into a prime (405389921) 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 15 ways as a sum of consecutive naturals, for example, 32493 + ... + 43203.

It is an arithmetic number, because the mean of its divisors is an integer number (16871400).

Almost surely, 2^405389928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 405389928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (539884800).

405389928 is an abundant number, since it is smaller than the sum of its proper divisors (674379672).

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

405389928 is a wasteful number, since it uses less digits than its factorization.

405389928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10822 (or 10818 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 48.

The square root of 405389928 is about 20134.2973058411. The cubic root of 405389928 is about 740.1009893825.

The spelling of 405389928 in words is "four hundred five million, three hundred eighty-nine thousand, nine hundred twenty-eight".