30712122 has 120 divisors (see below), whose sum is σ = 82681236. Its totient is φ = 8491392.

The previous prime is 30712117. The next prime is 30712139. The reversal of 30712122 is 22121703.

It can be written as a sum of positive squares in 2 ways, for example, as 30041361 + 670761 = 5481^2 + 819^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 30712095 and 30712104.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 420678 + ... + 420750.

Almost surely, 2^30712122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30712122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41340618).

30712122 is an abundant number, since it is smaller than the sum of its proper divisors (51969114).

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

30712122 is a wasteful number, since it uses less digits than its factorization.

30712122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 30712122 is about 5541.8518565548. The cubic root of 30712122 is about 313.1626370192.

Adding to 30712122 its reverse (22121703), we get a palindrome (52833825).

The spelling of 30712122 in words is "thirty million, seven hundred twelve thousand, one hundred twenty-two".