30725288 has 24 divisors (see below), whose sum is σ = 63325290. Its totient is φ = 13965600.

The previous prime is 30725287. The next prime is 30725291. The reversal of 30725288 is 88252703.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 23639044 + 7086244 = 4862^2 + 2662^2 .

It is not an unprimeable number, because it can be changed into a prime (30725287) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14903 + ... + 16838.

Almost surely, 2^30725288 is an apocalyptic number.

It is an amenable number.

30725288 is an abundant number, since it is smaller than the sum of its proper divisors (32600002).

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

30725288 is a wasteful number, since it uses less digits than its factorization.

30725288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31769 (or 31754 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 30725288 is about 5543.0395993534. The cubic root of 30725288 is about 313.2073805924.

It can be divided in two parts, 30725 and 288, that added together give a palindrome (31013).

The spelling of 30725288 in words is "thirty million, seven hundred twenty-five thousand, two hundred eighty-eight".