30987132 has 36 divisors (see below), whose sum is σ = 79477608. Its totient is φ = 9389600.

The previous prime is 30987101. The next prime is 30987149. The reversal of 30987132 is 23178903.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 30987093 and 30987102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9219 + ... + 12122.

Almost surely, 2^30987132 is an apocalyptic number.

It is an amenable number.

30987132 is an abundant number, since it is smaller than the sum of its proper divisors (48490476).

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

30987132 is a wasteful number, since it uses less digits than its factorization.

30987132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21370 (or 21357 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 30987132 is about 5566.6086623725. The cubic root of 30987132 is about 314.0945933244.

It can be divided in two parts, 309871 and 32, that added together give a palindrome (309903).

The spelling of 30987132 in words is "thirty million, nine hundred eighty-seven thousand, one hundred thirty-two".