402442010 has 16 divisors (see below), whose sum is σ = 736272072. Its totient is φ = 158337600.

The previous prime is 402441989. The next prime is 402442013. The reversal of 402442010 is 10244204.

It can be written as a sum of positive squares in 4 ways, for example, as 251127409 + 151314601 = 15847^2 + 12301^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 402442010.

It is not an unprimeable number, because it can be changed into a prime (402442013) 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, 329261 + ... + 330480.

Almost surely, 2^402442010 is an apocalyptic number.

402442010 is a deficient number, since it is larger than the sum of its proper divisors (333830062).

402442010 is a wasteful number, since it uses less digits than its factorization.

402442010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659809.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 402442010 is about 20060.9573550217. The cubic root of 402442010 is about 738.3026656895.

Adding to 402442010 its reverse (10244204), we get a palindrome (412686214).

The spelling of 402442010 in words is "four hundred two million, four hundred forty-two thousand, ten".