406728220 has 48 divisors (see below), whose sum is σ = 874450080. Its totient is φ = 158867456.

The previous prime is 406728211. The next prime is 406728299. The reversal of 406728220 is 22827604.

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, 146364 + ... + 149116.

It is an arithmetic number, because the mean of its divisors is an integer number (18217710).

Almost surely, 2^406728220 is an apocalyptic number.

It is an amenable number.

406728220 is an abundant number, since it is smaller than the sum of its proper divisors (467721860).

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

406728220 is a wasteful number, since it uses less digits than its factorization.

406728220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2934 (or 2932 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 406728220 is about 20167.5040597492. The cubic root of 406728220 is about 740.9145133748.

The spelling of 406728220 in words is "four hundred six million, seven hundred twenty-eight thousand, two hundred twenty".