30312272 has 20 divisors (see below), whose sum is σ = 58993620. Its totient is φ = 15088128.

The previous prime is 30312263. The next prime is 30312281. The reversal of 30312272 is 27221303.

It is an interprime number because it is at equal distance from previous prime (30312263) and next prime (30312281).

It can be written as a sum of positive squares in 2 ways, for example, as 25969216 + 4343056 = 5096^2 + 2084^2 .

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, 473 + ... + 7800.

It is an arithmetic number, because the mean of its divisors is an integer number (2949681).

Almost surely, 2^30312272 is an apocalyptic number.

It is an amenable number.

30312272 is a deficient number, since it is larger than the sum of its proper divisors (28681348).

30312272 is a wasteful number, since it uses less digits than its factorization.

30312272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8510 (or 8504 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 30312272 is about 5505.6581804540. The cubic root of 30312272 is about 311.7976443717.

Adding to 30312272 its reverse (27221303), we get a palindrome (57533575).

The spelling of 30312272 in words is "thirty million, three hundred twelve thousand, two hundred seventy-two".