406228140 has 36 divisors (see below), whose sum is σ = 1232225904. Its totient is φ = 108327456.

The previous prime is 406228117. The next prime is 406228171. The reversal of 406228140 is 41822604.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1128232 + ... + 1128591.

Almost surely, 2^406228140 is an apocalyptic number.

It is an amenable number.

406228140 is an abundant number, since it is smaller than the sum of its proper divisors (825997764).

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

406228140 is a wasteful number, since it uses less digits than its factorization.

406228140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2256838 (or 2256833 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 406228140 is about 20155.1020835916. The cubic root of 406228140 is about 740.6107327273.

The spelling of 406228140 in words is "four hundred six million, two hundred twenty-eight thousand, one hundred forty".