402505530 has 64 divisors (see below), whose sum is σ = 1107744768. Its totient is φ = 91690560.

The previous prime is 402505513. The next prime is 402505561. The reversal of 402505530 is 35505204.

It is a self number, because there is not a number n which added to its sum of digits gives 402505530.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62229 + ... + 68391.

It is an arithmetic number, because the mean of its divisors is an integer number (17308512).

Almost surely, 2^402505530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402505530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (553872384).

402505530 is an abundant number, since it is smaller than the sum of its proper divisors (705239238).

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

402505530 is a wasteful number, since it uses less digits than its factorization.

402505530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6491.

The product of its (nonzero) digits is 3000, while the sum is 24.

The square root of 402505530 is about 20062.5404672489. The cubic root of 402505530 is about 738.3415073255.

The spelling of 402505530 in words is "four hundred two million, five hundred five thousand, five hundred thirty".