405673648 has 20 divisors (see below), whose sum is σ = 790071208. Its totient is φ = 201784320.

The previous prime is 405673633. The next prime is 405673649. The reversal of 405673648 is 846376504.

It is a super-2 number, since 2×405673648² = 329142217363255808, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (405673649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62598 + ... + 68773.

Almost surely, 2^405673648 is an apocalyptic number.

It is an amenable number.

405673648 is a deficient number, since it is larger than the sum of its proper divisors (384397560).

405673648 is a wasteful number, since it uses less digits than its factorization.

405673648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131572 (or 131566 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 43.

The square root of 405673648 is about 20141.3417626533. The cubic root of 405673648 is about 740.2736071271.

The spelling of 405673648 in words is "four hundred five million, six hundred seventy-three thousand, six hundred forty-eight".