406285646 has 32 divisors (see below), whose sum is σ = 675386208. Its totient is φ = 182108160.

The previous prime is 406285631. The next prime is 406285657. The reversal of 406285646 is 646582604.

It is a super-2 number, since 2×406285646² = 330136052291274632, which contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 273221 + ... + 274703.

It is an arithmetic number, because the mean of its divisors is an integer number (21105819).

Almost surely, 2^406285646 is an apocalyptic number.

406285646 is a deficient number, since it is larger than the sum of its proper divisors (269100562).

406285646 is a wasteful number, since it uses less digits than its factorization.

406285646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1796.

The product of its (nonzero) digits is 276480, while the sum is 41.

The square root of 406285646 is about 20156.5286197797. The cubic root of 406285646 is about 740.6456782396.

The spelling of 406285646 in words is "four hundred six million, two hundred eighty-five thousand, six hundred forty-six".