402430020 has 96 divisors (see below), whose sum is σ = 1152197760. Its totient is φ = 104924160.

The previous prime is 402429971. The next prime is 402430033. The reversal of 402430020 is 20034204.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 608490 + ... + 609150.

It is an arithmetic number, because the mean of its divisors is an integer number (12002060).

Almost surely, 2^402430020 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 402430020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (576098880).

402430020 is an abundant number, since it is smaller than the sum of its proper divisors (749767740).

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

402430020 is a wasteful number, since it uses less digits than its factorization.

402430020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885 (or 883 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 402430020 is about 20060.6585136181. The cubic root of 402430020 is about 738.2953335053.

Adding to 402430020 its reverse (20034204), we get a palindrome (422464224).

The spelling of 402430020 in words is "four hundred two million, four hundred thirty thousand, twenty".