405456946 has 16 divisors (see below), whose sum is σ = 629703000. Its totient is φ = 195568128.

The previous prime is 405456923. The next prime is 405456959. The reversal of 405456946 is 649654504.

It can be written as a sum of positive squares in 4 ways, for example, as 178623225 + 226833721 = 13365^2 + 15061^2 .

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 7 ways as a sum of consecutive naturals, for example, 87586 + ... + 92098.

Almost surely, 2^405456946 is an apocalyptic number.

405456946 is a deficient number, since it is larger than the sum of its proper divisors (224246054).

405456946 is a wasteful number, since it uses less digits than its factorization.

405456946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6093.

The product of its (nonzero) digits is 518400, while the sum is 43.

The square root of 405456946 is about 20135.9615116835. The cubic root of 405456946 is about 740.1417709869.

The spelling of 405456946 in words is "four hundred five million, four hundred fifty-six thousand, nine hundred forty-six".