402620 has 24 divisors (see below), whose sum is σ = 867888. Its totient is φ = 156800.

The previous prime is 402613. The next prime is 402631. The reversal of 402620 is 26204.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 402595 and 402604.

It is a congruent number.

It is an unprimeable number.

402620 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, 575 + ... + 1065.

It is an arithmetic number, because the mean of its divisors is an integer number (36162).

2⁴⁰²⁶²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (433944).

402620 is an abundant number, since it is smaller than the sum of its proper divisors (465268).

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

402620 is a wasteful number, since it uses less digits than its factorization.

402620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541 (or 539 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 402620 is about 634.5234432233. The cubic root of 402620 is about 73.8411493893.

Adding to 402620 its reverse (26204), we get a palindrome (428824).

The spelling of 402620 in words is "four hundred two thousand, six hundred twenty".