30894986 has 4 divisors (see below), whose sum is σ = 46342482. Its totient is φ = 15447492.

The previous prime is 30894979. The next prime is 30894989. The reversal of 30894986 is 68949803.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19971961 + 10923025 = 4469^2 + 3305^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 30894986.

It is not an unprimeable number, because it can be changed into a prime (30894989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7723745 + ... + 7723748.

Almost surely, 2^30894986 is an apocalyptic number.

30894986 is a deficient number, since it is larger than the sum of its proper divisors (15447496).

30894986 is a wasteful number, since it uses less digits than its factorization.

30894986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15447495.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 30894986 is about 5558.3258270814. The cubic root of 30894986 is about 313.7829446420.

The spelling of 30894986 in words is "thirty million, eight hundred ninety-four thousand, nine hundred eighty-six".