406722 has 16 divisors (see below), whose sum is σ = 829440. Its totient is φ = 132912.

The previous prime is 406717. The next prime is 406729. The reversal of 406722 is 227604.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (406729) by changing a digit.

406722 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 322 + ... + 957.

It is an arithmetic number, because the mean of its divisors is an integer number (51840).

2⁴⁰⁶⁷²² is an apocalyptic number.

406722 is an abundant number, since it is smaller than the sum of its proper divisors (422718).

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

406722 is a wasteful number, since it uses less digits than its factorization.

406722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1337.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 406722 is about 637.7475989763. The cubic root of 406722 is about 74.0910736478.

It can be divided in two parts, 406 and 722, that added together give a triangular number (1128 = T₄₇).

The spelling of 406722 in words is "four hundred six thousand, seven hundred twenty-two".