402225140 has 12 divisors (see below), whose sum is σ = 844672836. Its totient is φ = 160890048.

The previous prime is 402225121. The next prime is 402225143. The reversal of 402225140 is 41522204.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 260757904 + 141467236 = 16148^2 + 11894^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 20111257 = 402225140 / (4 + 0 + 2 + 2 + 2 + 5 + 1 + 4 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402225143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10055609 + ... + 10055648.

It is an arithmetic number, because the mean of its divisors is an integer number (70389403).

Almost surely, 2^402225140 is an apocalyptic number.

It is an amenable number.

402225140 is an abundant number, since it is smaller than the sum of its proper divisors (442447696).

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

402225140 is a wasteful number, since it uses less digits than its factorization.

402225140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20111266 (or 20111264 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 402225140 is about 20055.5513511845. The cubic root of 402225140 is about 738.1700217598.

Adding to 402225140 its reverse (41522204), we get a palindrome (443747344).

The spelling of 402225140 in words is "four hundred two million, two hundred twenty-five thousand, one hundred forty".