30878772 has 12 divisors (see below), whose sum is σ = 72050496. Its totient is φ = 10292920.

The previous prime is 30878767. The next prime is 30878777. The reversal of 30878772 is 27787803.

It is an interprime number because it is at equal distance from previous prime (30878767) and next prime (30878777).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30878777) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 1286604 + ... + 1286627.

It is an arithmetic number, because the mean of its divisors is an integer number (6004208).

Almost surely, 2^30878772 is an apocalyptic number.

It is an amenable number.

30878772 is an abundant number, since it is smaller than the sum of its proper divisors (41171724).

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

30878772 is a wasteful number, since it uses less digits than its factorization.

30878772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2573238 (or 2573236 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 42.

The square root of 30878772 is about 5556.8671029637. The cubic root of 30878772 is about 313.7280428860.

The spelling of 30878772 in words is "thirty million, eight hundred seventy-eight thousand, seven hundred seventy-two".