402113220 has 96 divisors (see below), whose sum is σ = 1152592896. Its totient is φ = 104716800.

The previous prime is 402113177. The next prime is 402113287. The reversal of 402113220 is 22311204.

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

It is a self number, because there is not a number n which added to its sum of digits gives 402113220.

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 31 ways as a sum of consecutive naturals, for example, 662157 + ... + 662763.

It is an arithmetic number, because the mean of its divisors is an integer number (12006176).

Almost surely, 2^402113220 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 402113220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (576296448).

402113220 is an abundant number, since it is smaller than the sum of its proper divisors (750479676).

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

402113220 is a wasteful number, since it uses less digits than its factorization.

402113220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861 (or 859 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 402113220 is about 20052.7609071669. The cubic root of 402113220 is about 738.1015496162.

Adding to 402113220 its reverse (22311204), we get a palindrome (424424424).

The spelling of 402113220 in words is "four hundred two million, one hundred thirteen thousand, two hundred twenty".