302740252140 has 96 divisors (see below), whose sum is σ = 869054731776. Its totient is φ = 78701575680.

The previous prime is 302740252049. The next prime is 302740252169. The reversal of 302740252140 is 41252047203.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 302740252098 and 302740252107.

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, 1231569 + ... + 1456791.

It is an arithmetic number, because the mean of its divisors is an integer number (9052653456).

Almost surely, 2^302740252140 is an apocalyptic number.

302740252140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 302740252140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (434527365888).

302740252140 is an abundant number, since it is smaller than the sum of its proper divisors (566314479636).

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

302740252140 is a wasteful number, since it uses less digits than its factorization.

302740252140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225799 (or 225797 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 30.

Adding to 302740252140 its reverse (41252047203), we get a palindrome (343992299343).

The spelling of 302740252140 in words is "three hundred two billion, seven hundred forty million, two hundred fifty-two thousand, one hundred forty".