402402220 has 48 divisors (see below), whose sum is σ = 928569600. Its totient is φ = 145264320.

The previous prime is 402402199. The next prime is 402402239. The reversal of 402402220 is 22204204.

It is a junction number, because it is equal to n+sod(n) for n = 402402194 and 402402203.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24001 + ... + 37159.

It is an arithmetic number, because the mean of its divisors is an integer number (19345200).

Almost surely, 2^402402220 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 402402220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (464284800).

402402220 is an abundant number, since it is smaller than the sum of its proper divisors (526167380).

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

402402220 is a wasteful number, since it uses less digits than its factorization.

402402220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13318 (or 13316 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 402402220 is about 20059.9656031609. The cubic root of 402402220 is about 738.2783325512.

Adding to 402402220 its reverse (22204204), we get a palindrome (424606424).

The spelling of 402402220 in words is "four hundred two million, four hundred two thousand, two hundred twenty".