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401022 = 23222279

401022 has 12 divisors (see below), whose sum is σ = 868920. Its totient is φ = 133668.

The previous prime is 401017. The next prime is 401029. The reversal of 401022 is 220104.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 400995 and 401013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401029) by changing a digit.

401022 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 5 ways as a sum of consecutive naturals, for example, 11122 + ... + 11157.

It is an arithmetic number, because the mean of its divisors is an integer number (72410).

2401022 is an apocalyptic number.

401022 is an abundant number, since it is smaller than the sum of its proper divisors (467898).

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

401022 is a wasteful number, since it uses less digits than its factorization.

401022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22287 (or 22284 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 401022 is about 633.2629785484. The cubic root of 401022 is about 73.7433279418.

Adding to 401022 its reverse (220104), we get a palindrome (621126).

It can be divided in two parts, 40102 and 2, that added together give a palindrome (40104).

The spelling of 401022 in words is "four hundred one thousand, twenty-two", and thus it is an iban number.

Divisors: 1 2 3 6 9 18 22279 44558 66837 133674 200511 401022