30898138257 has 40 divisors (see below), whose sum is σ = 55526609600. Its totient is φ = 16726805856.

The previous prime is 30898138237. The next prime is 30898138267. The reversal of 30898138257 is 75283189803.

30898138257 is a `hidden beast` number, since 308 + 9 + 81 + 3 + 8 + 257 = 666.

It is not a de Polignac number, because 30898138257 - 2¹⁹ = 30897613969 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (30898138237) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1423282 + ... + 1444827.

It is an arithmetic number, because the mean of its divisors is an integer number (1388165240).

Almost surely, 2^30898138257 is an apocalyptic number.

It is an amenable number.

30898138257 is a deficient number, since it is larger than the sum of its proper divisors (24628471343).

30898138257 is a wasteful number, since it uses less digits than its factorization.

30898138257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2868147 (or 2868138 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 30898138257 in words is "thirty billion, eight hundred ninety-eight million, one hundred thirty-eight thousand, two hundred fifty-seven".