30978752 has 28 divisors (see below), whose sum is σ = 70256400. Its totient is φ = 13276416.

The previous prime is 30978751. The next prime is 30978763. The reversal of 30978752 is 25787903.

It is a tau number, because it is divible by the number of its divisors (28).

It is not an unprimeable number, because it can be changed into a prime (30978751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34127 + ... + 35022.

Almost surely, 2^30978752 is an apocalyptic number.

30978752 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

30978752 is an abundant number, since it is smaller than the sum of its proper divisors (39277648).

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

30978752 is an equidigital number, since it uses as much as digits as its factorization.

30978752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69168 (or 69158 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 30978752 is about 5565.8559090224. The cubic root of 30978752 is about 314.0662767316.

The spelling of 30978752 in words is "thirty million, nine hundred seventy-eight thousand, seven hundred fifty-two".