30987486 has 72 divisors (see below), whose sum is σ = 73373040. Its totient is φ = 9432192.

The previous prime is 30987443. The next prime is 30987493. The reversal of 30987486 is 68478903.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 348130 + ... + 348218.

It is an arithmetic number, because the mean of its divisors is an integer number (1019070).

Almost surely, 2^30987486 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30987486, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36686520).

30987486 is an abundant number, since it is smaller than the sum of its proper divisors (42385554).

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

30987486 is a wasteful number, since it uses less digits than its factorization.

30987486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 30987486 is about 5566.6404590201. The cubic root of 30987486 is about 314.0957894022.

The spelling of 30987486 in words is "thirty million, nine hundred eighty-seven thousand, four hundred eighty-six".