30980355 has 64 divisors (see below), whose sum is σ = 60963840. Its totient is φ = 13118976.

The previous prime is 30980351. The next prime is 30980357. The reversal of 30980355 is 55308903.

It is a Cunningham number, because it is equal to 5566²-1.

It is not a de Polignac number, because 30980355 - 2² = 30980351 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30980351) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 105589 + ... + 105881.

It is an arithmetic number, because the mean of its divisors is an integer number (952560).

Almost surely, 2^30980355 is an apocalyptic number.

30980355 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

30980355 is a deficient number, since it is larger than the sum of its proper divisors (29983485).

30980355 is a wasteful number, since it uses less digits than its factorization.

30980355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380.

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 30980355 is about 5565.9999101689. Note that the first 4 decimals coincide. The cubic root of 30980355 is about 314.0716937731.

The spelling of 30980355 in words is "thirty million, nine hundred eighty thousand, three hundred fifty-five".