30987887 has 8 divisors (see below), whose sum is σ = 35599776. Its totient is φ = 26422272.

The previous prime is 30987871. The next prime is 30987953. The reversal of 30987887 is 78878903.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30987887 - 2⁴ = 30987871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30947887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10118 + ... + 12819.

It is an arithmetic number, because the mean of its divisors is an integer number (4449972).

Almost surely, 2^30987887 is an apocalyptic number.

30987887 is a deficient number, since it is larger than the sum of its proper divisors (4611889).

30987887 is a wasteful number, since it uses less digits than its factorization.

30987887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23137.

The product of its (nonzero) digits is 677376, while the sum is 50.

The square root of 30987887 is about 5566.6764770373. The cubic root of 30987887 is about 314.0971442703.

The spelling of 30987887 in words is "thirty million, nine hundred eighty-seven thousand, eight hundred eighty-seven".