406228012281 has 144 divisors (see below), whose sum is σ = 778812278400. Its totient is φ = 199161151488.

The previous prime is 406228012277. The next prime is 406228012303. The reversal of 406228012281 is 182210822604.

406228012281 is a `hidden beast` number, since 4 + 0 + 622 + 8 + 0 + 1 + 2 + 28 + 1 = 666.

It is not a de Polignac number, because 406228012281 - 2² = 406228012277 is a prime.

It is a super-2 number, since 2×406228012281² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (406228012241) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 10702585 + ... + 10740473.

It is an arithmetic number, because the mean of its divisors is an integer number (5408418600).

Almost surely, 2^406228012281 is an apocalyptic number.

It is an amenable number.

406228012281 is a deficient number, since it is larger than the sum of its proper divisors (372584266119).

406228012281 is a wasteful number, since it uses less digits than its factorization.

406228012281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38000 (or 37984 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

Adding to 406228012281 its reverse (182210822604), we get a palindrome (588438834885).

The spelling of 406228012281 in words is "four hundred six billion, two hundred twenty-eight million, twelve thousand, two hundred eighty-one".