30402215440 has 80 divisors (see below), whose sum is σ = 71017887600. Its totient is φ = 12103796736.

The previous prime is 30402215429. The next prime is 30402215443. The reversal of 30402215440 is 4451220403.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 3090025744 + 27312189696 = 55588^2 + 165264^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (30402215443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24736746 + ... + 24737974.

It is an arithmetic number, because the mean of its divisors is an integer number (887723595).

Almost surely, 2^30402215440 is an apocalyptic number.

It is an amenable number.

30402215440 is an abundant number, since it is smaller than the sum of its proper divisors (40615672160).

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

30402215440 is a wasteful number, since it uses less digits than its factorization.

30402215440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2444 (or 2438 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 30402215440 its reverse (4451220403), we get a palindrome (34853435843).

The spelling of 30402215440 in words is "thirty billion, four hundred two million, two hundred fifteen thousand, four hundred forty".