30772256 has 12 divisors (see below), whose sum is σ = 60582942. Its totient is φ = 15386112.

The previous prime is 30772253. The next prime is 30772279. The reversal of 30772256 is 65227703.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 30691600 + 80656 = 5540^2 + 284^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 961633 = 30772256 / (3 + 0 + 7 + 7 + 2 + 2 + 5 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30772253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480785 + ... + 480848.

Almost surely, 2^30772256 is an apocalyptic number.

It is an amenable number.

30772256 is a deficient number, since it is larger than the sum of its proper divisors (29810686).

30772256 is an equidigital number, since it uses as much as digits as its factorization.

30772256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961643 (or 961635 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 32.

The square root of 30772256 is about 5547.2746461663. The cubic root of 30772256 is about 313.3668934427.

Adding to 30772256 its reverse (65227703), we get a palindrome (95999959).

The spelling of 30772256 in words is "thirty million, seven hundred seventy-two thousand, two hundred fifty-six".