405166672 has 20 divisors (see below), whose sum is σ = 793106356. Its totient is φ = 200494080.

The previous prime is 405166639. The next prime is 405166681. The reversal of 405166672 is 276661504.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 319122496 + 86044176 = 17864^2 + 9276^2 .

It is a congruent number.

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, 128979 + ... + 132082.

Almost surely, 2^405166672 is an apocalyptic number.

It is an amenable number.

405166672 is a deficient number, since it is larger than the sum of its proper divisors (387939684).

405166672 is a wasteful number, since it uses less digits than its factorization.

405166672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261166 (or 261160 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 405166672 is about 20128.7523706761. The cubic root of 405166672 is about 739.9651018361.

The spelling of 405166672 in words is "four hundred five million, one hundred sixty-six thousand, six hundred seventy-two".