405729896 has 64 divisors (see below), whose sum is σ = 904720320. Its totient is φ = 168145920.

The previous prime is 405729887. The next prime is 405729931. The reversal of 405729896 is 698927504.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92816 + ... + 97088.

It is an arithmetic number, because the mean of its divisors is an integer number (14136255).

Almost surely, 2^405729896 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 405729896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (452360160).

405729896 is an abundant number, since it is smaller than the sum of its proper divisors (498990424).

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

405729896 is a wasteful number, since it uses less digits than its factorization.

405729896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4386 (or 4382 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 50.

The square root of 405729896 is about 20142.7380462538. The cubic root of 405729896 is about 740.3078193449.

The spelling of 405729896 in words is "four hundred five million, seven hundred twenty-nine thousand, eight hundred ninety-six".