402222620 has 24 divisors (see below), whose sum is σ = 881393184. Its totient is φ = 153893696.

The previous prime is 402222599. The next prime is 402222629. The reversal of 402222620 is 26222204.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 402222592 and 402222601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402222629) 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, 436739 + ... + 437658.

It is an arithmetic number, because the mean of its divisors is an integer number (36724716).

Almost surely, 2^402222620 is an apocalyptic number.

It is an amenable number.

402222620 is an abundant number, since it is smaller than the sum of its proper divisors (479170564).

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

402222620 is a wasteful number, since it uses less digits than its factorization.

402222620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874429 (or 874427 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 402222620 is about 20055.4885255882. The cubic root of 402222620 is about 738.1684801752.

Adding to 402222620 its reverse (26222204), we get a palindrome (428444824).

The spelling of 402222620 in words is "four hundred two million, two hundred twenty-two thousand, six hundred twenty".