30122440 has 32 divisors (see below), whose sum is σ = 69610680. Its totient is φ = 11722752.

The previous prime is 30122423. The next prime is 30122447. The reversal of 30122440 is 4422103.

It can be written as a sum of positive squares in 4 ways, for example, as 27478564 + 2643876 = 5242^2 + 1626^2 .

It is a super-2 number, since 2×30122440² = 1814722783107200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30122447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8697 + ... + 11656.

Almost surely, 2^30122440 is an apocalyptic number.

It is an amenable number.

30122440 is an abundant number, since it is smaller than the sum of its proper divisors (39488240).

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

30122440 is a wasteful number, since it uses less digits than its factorization.

30122440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20401 (or 20397 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 30122440 is about 5488.3913854608. The cubic root of 30122440 is about 311.1453985264.

Adding to 30122440 its reverse (4422103), we get a palindrome (34544543).

The spelling of 30122440 in words is "thirty million, one hundred twenty-two thousand, four hundred forty".