30978064 has 20 divisors (see below), whose sum is σ = 64637356. Its totient is φ = 14297472.

The previous prime is 30978047. The next prime is 30978071. The reversal of 30978064 is 46087903.

It can be written as a sum of positive squares in 2 ways, for example, as 1904400 + 29073664 = 1380^2 + 5392^2 .

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, 74259 + ... + 74674.

Almost surely, 2^30978064 is an apocalyptic number.

It is an amenable number.

30978064 is an abundant number, since it is smaller than the sum of its proper divisors (33659292).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30978064 is a wasteful number, since it uses less digits than its factorization.

30978064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148954 (or 148948 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 30978064 is about 5565.7941032704. The cubic root of 30978064 is about 314.0639517057.

The spelling of 30978064 in words is "thirty million, nine hundred seventy-eight thousand, sixty-four".