406555556 has 24 divisors (see below), whose sum is σ = 797131776. Its totient is φ = 179802720.

The previous prime is 406555547. The next prime is 406555573. The reversal of 406555556 is 655555604.

It is a super-3 number, since 3×406555556³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123236 + ... + 126491.

It is an arithmetic number, because the mean of its divisors is an integer number (33213824).

Almost surely, 2^406555556 is an apocalyptic number.

It is an amenable number.

406555556 is a deficient number, since it is larger than the sum of its proper divisors (390576220).

406555556 is a wasteful number, since it uses less digits than its factorization.

406555556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249779 (or 249777 counting only the distinct ones).

The product of its (nonzero) digits is 450000, while the sum is 41.

The square root of 406555556 is about 20163.2228574700. Note that the first 3 decimals coincide. The cubic root of 406555556 is about 740.8096543524.

The spelling of 406555556 in words is "four hundred six million, five hundred fifty-five thousand, five hundred fifty-six".