30897078 has 16 divisors (see below), whose sum is σ = 65046720. Its totient is φ = 9756936.

The previous prime is 30897077. The next prime is 30897089. The reversal of 30897078 is 87079803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30897077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135400 + ... + 135627.

It is an arithmetic number, because the mean of its divisors is an integer number (4065420).

Almost surely, 2^30897078 is an apocalyptic number.

30897078 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

30897078 is an abundant number, since it is smaller than the sum of its proper divisors (34149642).

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

30897078 is a wasteful number, since it uses less digits than its factorization.

30897078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271051.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 30897078 is about 5558.5140100570. The cubic root of 30897078 is about 313.7900269034.

The spelling of 30897078 in words is "thirty million, eight hundred ninety-seven thousand, seventy-eight".