30302312440 has 64 divisors (see below), whose sum is σ = 69302194560. Its totient is φ = 11922007680.

The previous prime is 30302312437. The next prime is 30302312459. The reversal of 30302312440 is 4421320303.

It is a happy number.

It is a super-2 number, since 2×30302312440² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1843699 + ... + 1860061.

It is an arithmetic number, because the mean of its divisors is an integer number (1082846790).

Almost surely, 2^30302312440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30302312440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34651097280).

30302312440 is an abundant number, since it is smaller than the sum of its proper divisors (38999882120).

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

30302312440 is a wasteful number, since it uses less digits than its factorization.

30302312440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17132 (or 17128 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 30302312440 its reverse (4421320303), we get a palindrome (34723632743).

The spelling of 30302312440 in words is "thirty billion, three hundred two million, three hundred twelve thousand, four hundred forty".