402240222 has 64 divisors (see below), whose sum is σ = 956486400. Its totient is φ = 124921440.

The previous prime is 402240211. The next prime is 402240233. The reversal of 402240222 is 222042204.

402240222 is a `hidden beast` number, since 402 + 2 + 40 + 222 = 666.

It is an interprime number because it is at equal distance from previous prime (402240211) and next prime (402240233).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 402240195 and 402240204.

It is a congruent number.

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, 59373 + ... + 65799.

It is an arithmetic number, because the mean of its divisors is an integer number (14945100).

Almost surely, 2^402240222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402240222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (478243200).

402240222 is an abundant number, since it is smaller than the sum of its proper divisors (554246178).

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

402240222 is a wasteful number, since it uses less digits than its factorization.

402240222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6518 (or 6512 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 402240222 is about 20055.9273532789. The cubic root of 402240222 is about 738.1792478872.

Adding to 402240222 its reverse (222042204), we get a palindrome (624282426).

It can be divided in two parts, 4022 and 40222, that added together give a palindrome (44244).

The spelling of 402240222 in words is "four hundred two million, two hundred forty thousand, two hundred twenty-two".