30487140 has 36 divisors (see below), whose sum is σ = 92478204. Its totient is φ = 8129856.

The previous prime is 30487133. The next prime is 30487141. The reversal of 30487140 is 4178403.

It can be written as a sum of positive squares in 2 ways, for example, as 9474084 + 21013056 = 3078^2 + 4584^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (30487141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84507 + ... + 84866.

It is an arithmetic number, because the mean of its divisors is an integer number (2568839).

Almost surely, 2^30487140 is an apocalyptic number.

30487140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30487140 is an abundant number, since it is smaller than the sum of its proper divisors (61991064).

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

30487140 is a wasteful number, since it uses less digits than its factorization.

30487140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169388 (or 169383 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 30487140 is about 5521.5160961461. The cubic root of 30487140 is about 312.3960699725.

The spelling of 30487140 in words is "thirty million, four hundred eighty-seven thousand, one hundred forty".