30894880 has 24 divisors (see below), whose sum is σ = 72989532. Its totient is φ = 12357888.

The previous prime is 30894821. The next prime is 30894883. The reversal of 30894880 is 8849803.

It can be written as a sum of positive squares in 2 ways, for example, as 26749584 + 4145296 = 5172^2 + 2036^2 .

It is a super-2 number, since 2×30894880² = 1908987220428800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (30894883) 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, 96387 + ... + 96706.

Almost surely, 2^30894880 is an apocalyptic number.

It is an amenable number.

30894880 is an abundant number, since it is smaller than the sum of its proper divisors (42094652).

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

30894880 is a wasteful number, since it uses less digits than its factorization.

30894880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193108 (or 193100 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 30894880 is about 5558.3162918279. The cubic root of 30894880 is about 313.7825857808.

The spelling of 30894880 in words is "thirty million, eight hundred ninety-four thousand, eight hundred eighty".