30988946 has 4 divisors (see below), whose sum is σ = 46483422. Its totient is φ = 15494472.

The previous prime is 30988927. The next prime is 30988957. The reversal of 30988946 is 64988903.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64988903 = 7 ⋅9284129.

It can be written as a sum of positive squares in only one way, i.e., 22515025 + 8473921 = 4745^2 + 2911^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 30988946.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7747235 + ... + 7747238.

Almost surely, 2^30988946 is an apocalyptic number.

30988946 is a deficient number, since it is larger than the sum of its proper divisors (15494476).

30988946 is a wasteful number, since it uses less digits than its factorization.

30988946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15494475.

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

The square root of 30988946 is about 5566.7715958175. The cubic root of 30988946 is about 314.1007222822.

The spelling of 30988946 in words is "thirty million, nine hundred eighty-eight thousand, nine hundred forty-six".