30572240 has 40 divisors (see below), whose sum is σ = 71332488. Its totient is φ = 12185600.

The previous prime is 30572237. The next prime is 30572261. The reversal of 30572240 is 4227503.

It can be written as a sum of positive squares in 4 ways, for example, as 10394176 + 20178064 = 3224^2 + 4492^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31604 + ... + 32556.

Almost surely, 2^30572240 is an apocalyptic number.

It is an amenable number.

30572240 is an abundant number, since it is smaller than the sum of its proper divisors (40760248).

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

30572240 is a wasteful number, since it uses less digits than its factorization.

30572240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1367 (or 1361 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 30572240 is about 5529.2169427506. The cubic root of 30572240 is about 312.6864679130.

Adding to 30572240 its reverse (4227503), we get a palindrome (34799743).

The spelling of 30572240 in words is "thirty million, five hundred seventy-two thousand, two hundred forty".