405450256 has 20 divisors (see below), whose sum is σ = 819715392. Its totient is φ = 193910816.

The previous prime is 405450217. The next prime is 405450277. The reversal of 405450256 is 652054504.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 550516 + ... + 551251.

Almost surely, 2^405450256 is an apocalyptic number.

405450256 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is an amenable number.

405450256 is an abundant number, since it is smaller than the sum of its proper divisors (414265136).

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

405450256 is a wasteful number, since it uses less digits than its factorization.

405450256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101798 (or 1101792 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 31.

The square root of 405450256 is about 20135.7953902993. The cubic root of 405450256 is about 740.1377002089.

The spelling of 405450256 in words is "four hundred five million, four hundred fifty thousand, two hundred fifty-six".