405726648 has 16 divisors (see below), whose sum is σ = 1014316680. Its totient is φ = 135242208.

The previous prime is 405726637. The next prime is 405726649. The reversal of 405726648 is 846627504.

It is a super-2 number, since 2×405726648² = 329228225794631808, which contains 22 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405726649) 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, 8452615 + ... + 8452662.

Almost surely, 2^405726648 is an apocalyptic number.

It is an amenable number.

405726648 is an abundant number, since it is smaller than the sum of its proper divisors (608590032).

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

405726648 is a wasteful number, since it uses less digits than its factorization.

405726648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16905286 (or 16905282 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 42.

The square root of 405726648 is about 20142.6574215023. The cubic root of 405726648 is about 740.3058438712.

The spelling of 405726648 in words is "four hundred five million, seven hundred twenty-six thousand, six hundred forty-eight".