302142440 has 32 divisors (see below), whose sum is σ = 682265160. Its totient is φ = 120422400.

The previous prime is 302142419. The next prime is 302142443. The reversal of 302142440 is 44241203.

It can be written as a sum of positive squares in 4 ways, for example, as 286760356 + 15382084 = 16934^2 + 3922^2 .

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

It is not an unprimeable number, because it can be changed into a prime (302142443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2201 + ... + 24680.

Almost surely, 2^302142440 is an apocalyptic number.

It is an amenable number.

302142440 is an abundant number, since it is smaller than the sum of its proper divisors (380122720).

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

302142440 is a wasteful number, since it uses less digits than its factorization.

302142440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27173 (or 27169 counting only the distinct ones).

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

The square root of 302142440 is about 17382.2449643307. The cubic root of 302142440 is about 671.0227492670.

Adding to 302142440 its reverse (44241203), we get a palindrome (346383643).

The spelling of 302142440 in words is "three hundred two million, one hundred forty-two thousand, four hundred forty".