30881386 has 8 divisors (see below), whose sum is σ = 46345824. Its totient is φ = 15432780.

The previous prime is 30881371. The next prime is 30881407. The reversal of 30881386 is 68318803.

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

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, 4771 + ... + 9193.

It is an arithmetic number, because the mean of its divisors is an integer number (5793228).

Almost surely, 2^30881386 is an apocalyptic number.

30881386 is a deficient number, since it is larger than the sum of its proper divisors (15464438).

30881386 is a wasteful number, since it uses less digits than its factorization.

30881386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7916.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 30881386 is about 5557.1023024594. The cubic root of 30881386 is about 313.7368953749.

It can be divided in two parts, 3088138 and 6, that multiplied together give a triangular number (18528828 = T₆₀₈₇).

The spelling of 30881386 in words is "thirty million, eight hundred eighty-one thousand, three hundred eighty-six".