402135230 has 32 divisors (see below), whose sum is σ = 828446400. Its totient is φ = 137675520.

The previous prime is 402135179. The next prime is 402135259. The reversal of 402135230 is 32531204.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49496 + ... + 57044.

It is an arithmetic number, because the mean of its divisors is an integer number (25888950).

Almost surely, 2^402135230 is an apocalyptic number.

402135230 is an abundant number, since it is smaller than the sum of its proper divisors (426311170).

402135230 is a wasteful number, since it uses less digits than its factorization.

402135230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8324.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 402135230 is about 20053.3097018921. The cubic root of 402135230 is about 738.1150162369.

Adding to 402135230 its reverse (32531204), we get a palindrome (434666434).

The spelling of 402135230 in words is "four hundred two million, one hundred thirty-five thousand, two hundred thirty".