30987642 has 16 divisors (see below), whose sum is σ = 70828992. Its totient is φ = 8853600.

The previous prime is 30987637. The next prime is 30987661. The reversal of 30987642 is 24678903.

It is a self number, because there is not a number n which added to its sum of digits gives 30987642.

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, 368859 + ... + 368942.

It is an arithmetic number, because the mean of its divisors is an integer number (4426812).

Almost surely, 2^30987642 is an apocalyptic number.

30987642 is an abundant number, since it is smaller than the sum of its proper divisors (39841350).

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

30987642 is a wasteful number, since it uses less digits than its factorization.

30987642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737813.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 30987642 is about 5566.6544710445. The cubic root of 30987642 is about 314.0963164844.

The spelling of 30987642 in words is "thirty million, nine hundred eighty-seven thousand, six hundred forty-two".