402406620 has 288 divisors, whose sum is σ = 1494775296. Its totient is φ = 79833600.

The previous prime is 402406619. The next prime is 402406637. The reversal of 402406620 is 26604204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 743550 + ... + 744090.

It is an arithmetic number, because the mean of its divisors is an integer number (5190192).

Almost surely, 2^402406620 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 402406620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (747387648).

402406620 is an abundant number, since it is smaller than the sum of its proper divisors (1092368676).

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

402406620 is a wasteful number, since it uses less digits than its factorization.

402406620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601 (or 592 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 402406620 is about 20060.0752740362. The cubic root of 402406620 is about 738.2810234019.

The spelling of 402406620 in words is "four hundred two million, four hundred six thousand, six hundred twenty".