30780224 has 14 divisors (see below), whose sum is σ = 61079634. Its totient is φ = 15390080.

The previous prime is 30780221. The next prime is 30780229. The reversal of 30780224 is 42208703.

It can be written as a sum of positive squares in only one way, i.e., 28729600 + 2050624 = 5360^2 + 1432^2 .

It is a junction number, because it is equal to n+sod(n) for n = 30780193 and 30780202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30780221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 240407 + ... + 240534.

It is an arithmetic number, because the mean of its divisors is an integer number (4362831).

Almost surely, 2^30780224 is an apocalyptic number.

It is an amenable number.

30780224 is a deficient number, since it is larger than the sum of its proper divisors (30299410).

30780224 is an equidigital number, since it uses as much as digits as its factorization.

30780224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480953 (or 480943 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 30780224 is about 5547.9927901900. The cubic root of 30780224 is about 313.3939382795.

Adding to 30780224 its reverse (42208703), we get a palindrome (72988927).

The spelling of 30780224 in words is "thirty million, seven hundred eighty thousand, two hundred twenty-four".