30978050 has 12 divisors (see below), whose sum is σ = 57619266. Its totient is φ = 12391200.

The previous prime is 30978047. The next prime is 30978071. The reversal of 30978050 is 5087903.

It can be written as a sum of positive squares in 3 ways, for example, as 17280649 + 13697401 = 4157^2 + 3701^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30977998 and 30978016.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 309731 + ... + 309830.

Almost surely, 2^30978050 is an apocalyptic number.

30978050 is a deficient number, since it is larger than the sum of its proper divisors (26641216).

30978050 is a wasteful number, since it uses less digits than its factorization.

30978050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619573 (or 619568 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 30978050 is about 5565.7928455881. The cubic root of 30978050 is about 314.0639043938.

The spelling of 30978050 in words is "thirty million, nine hundred seventy-eight thousand, fifty".