30122740 has 12 divisors (see below), whose sum is σ = 63257796. Its totient is φ = 12049088.

The previous prime is 30122737. The next prime is 30122753. The reversal of 30122740 is 4722103.

It can be written as a sum of positive squares in 2 ways, for example, as 17205904 + 12916836 = 4148^2 + 3594^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 753049 + ... + 753088.

It is an arithmetic number, because the mean of its divisors is an integer number (5271483).

Almost surely, 2^30122740 is an apocalyptic number.

It is an amenable number.

30122740 is an abundant number, since it is smaller than the sum of its proper divisors (33135056).

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

30122740 is a wasteful number, since it uses less digits than its factorization.

30122740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1506146 (or 1506144 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 30122740 is about 5488.4187158051. The cubic root of 30122740 is about 311.1464314586.

Adding to 30122740 its reverse (4722103), we get a palindrome (34844843).

The spelling of 30122740 in words is "thirty million, one hundred twenty-two thousand, seven hundred forty".