402122320 has 40 divisors (see below), whose sum is σ = 936368640. Its totient is φ = 160602240.

The previous prime is 402122311. The next prime is 402122321. The reversal of 402122320 is 23221204.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 402122294 and 402122303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402122321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54025 + ... + 61015.

It is an arithmetic number, because the mean of its divisors is an integer number (23409216).

Almost surely, 2^402122320 is an apocalyptic number.

402122320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402122320 is an abundant number, since it is smaller than the sum of its proper divisors (534246320).

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

402122320 is a wasteful number, since it uses less digits than its factorization.

402122320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7723 (or 7717 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 402122320 is about 20052.9878073069. The cubic root of 402122320 is about 738.1071174290.

Adding to 402122320 its reverse (23221204), we get a palindrome (425343524).

The spelling of 402122320 in words is "four hundred two million, one hundred twenty-two thousand, three hundred twenty".