30532640 has 24 divisors (see below), whose sum is σ = 72133740. Its totient is φ = 12212992.

The previous prime is 30532609. The next prime is 30532643. The reversal of 30532640 is 4623503.

It can be written as a sum of positive squares in 2 ways, for example, as 29899024 + 633616 = 5468^2 + 796^2 .

It is not an unprimeable number, because it can be changed into a prime (30532643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95255 + ... + 95574.

Almost surely, 2^30532640 is an apocalyptic number.

It is an amenable number.

30532640 is an abundant number, since it is smaller than the sum of its proper divisors (41601100).

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

30532640 is a wasteful number, since it uses less digits than its factorization.

30532640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190844 (or 190836 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 30532640 is about 5525.6348051604. The cubic root of 30532640 is about 312.5514027444.

The spelling of 30532640 in words is "thirty million, five hundred thirty-two thousand, six hundred forty".