402424330 has 128 divisors (see below), whose sum is σ = 974094336. Its totient is φ = 115948800.

The previous prime is 402424327. The next prime is 402424331. The reversal of 402424330 is 33424204.

402424330 = 2248² + 2249² + ... + 2324².

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (402424331) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 548644 + ... + 549376.

It is an arithmetic number, because the mean of its divisors is an integer number (7610112).

Almost surely, 2^402424330 is an apocalyptic number.

402424330 is an abundant number, since it is smaller than the sum of its proper divisors (571670006).

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

402424330 is a wasteful number, since it uses less digits than its factorization.

402424330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812.

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 402424330 is about 20060.5166932460. The cubic root of 402424330 is about 738.2918538774.

Adding to 402424330 its reverse (33424204), we get a palindrome (435848534).

The spelling of 402424330 in words is "four hundred two million, four hundred twenty-four thousand, three hundred thirty".