30987485 has 4 divisors (see below), whose sum is σ = 37184988. Its totient is φ = 24789984.

The previous prime is 30987443. The next prime is 30987493. The reversal of 30987485 is 58478903.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19945156 + 11042329 = 4466^2 + 3323^2 .

It is a cyclic number.

It is not a de Polignac number, because 30987485 - 2⁶ = 30987421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3098744 + ... + 3098753.

It is an arithmetic number, because the mean of its divisors is an integer number (9296247).

Almost surely, 2^30987485 is an apocalyptic number.

It is an amenable number.

30987485 is a deficient number, since it is larger than the sum of its proper divisors (6197503).

30987485 is an equidigital number, since it uses as much as digits as its factorization.

30987485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6197502.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 30987485 is about 5566.6403691994. The cubic root of 30987485 is about 314.0957860235.

The spelling of 30987485 in words is "thirty million, nine hundred eighty-seven thousand, four hundred eighty-five".