406871028 has 18 divisors (see below), whose sum is σ = 1028479634. Its totient is φ = 135623664.

The previous prime is 406871027. The next prime is 406871039. The reversal of 406871028 is 820178604.

It can be written as a sum of positive squares in only one way, i.e., 349989264 + 56881764 = 18708^2 + 7542^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 11301973 = 406871028 / (4 + 0 + 6 + 8 + 7 + 1 + 0 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 406870983 and 406871001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406871027) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 5650951 + ... + 5651022.

Almost surely, 2^406871028 is an apocalyptic number.

It is an amenable number.

406871028 is an abundant number, since it is smaller than the sum of its proper divisors (621608606).

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

406871028 is a wasteful number, since it uses less digits than its factorization.

406871028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11301983 (or 11301978 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 406871028 is about 20171.0442962183. The cubic root of 406871028 is about 741.0012183975.

The spelling of 406871028 in words is "four hundred six million, eight hundred seventy-one thousand, twenty-eight".