400722 has 48 divisors (see below), whose sum is σ = 984960. Its totient is φ = 108192.

The previous prime is 400721. The next prime is 400723. The reversal of 400722 is 227004.

It is an interprime number because it is at equal distance from previous prime (400721) and next prime (400723).

It is not an unprimeable number, because it can be changed into a prime (400721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8503 + ... + 8549.

It is an arithmetic number, because the mean of its divisors is an integer number (20520).

2⁴⁰⁰⁷²² is an apocalyptic number.

400722 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 400722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (492480).

400722 is an abundant number, since it is smaller than the sum of its proper divisors (584238).

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

400722 is a wasteful number, since it uses less digits than its factorization.

400722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 15.

The square root of 400722 is about 633.0260658140. The cubic root of 400722 is about 73.7249345060.

Adding to 400722 its reverse (227004), we get a palindrome (627726).

The spelling of 400722 in words is "four hundred thousand, seven hundred twenty-two", and thus it is an iban number.