400505336 has 64 divisors (see below), whose sum is σ = 938580480. Its totient is φ = 155652480.

The previous prime is 400505323. The next prime is 400505381. The reversal of 400505336 is 633505004.

It is a congruent 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, 451085 + ... + 451971.

It is an arithmetic number, because the mean of its divisors is an integer number (14665320).

Almost surely, 2^400505336 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 400505336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (469290240).

400505336 is an abundant number, since it is smaller than the sum of its proper divisors (538075144).

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

400505336 is a wasteful number, since it uses less digits than its factorization.

400505336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644 (or 1640 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 400505336 is about 20012.6294124485. The cubic root of 400505336 is about 737.1164481140.

The spelling of 400505336 in words is "four hundred million, five hundred five thousand, three hundred thirty-six".