402224440 has 32 divisors (see below), whose sum is σ = 905651280. Its totient is φ = 160774912.

The previous prime is 402224401. The next prime is 402224441. The reversal of 402224440 is 44422204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402224441) 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, 73644 + ... + 78916.

Almost surely, 2^402224440 is an apocalyptic number.

402224440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402224440 is an abundant number, since it is smaller than the sum of its proper divisors (503426840).

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

402224440 is a wasteful number, since it uses less digits than its factorization.

402224440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7191 (or 7187 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

The square root of 402224440 is about 20055.5338996497. The cubic root of 402224440 is about 738.1695935425.

Adding to 402224440 its reverse (44422204), we get a palindrome (446646644).

The spelling of 402224440 in words is "four hundred two million, two hundred twenty-four thousand, four hundred forty".