30157897 has 8 divisors (see below), whose sum is σ = 37599552. Its totient is φ = 23499600.

The previous prime is 30157891. The next prime is 30157913. The reversal of 30157897 is 79875103.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30157897 - 2¹⁹ = 29633609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30157891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195754 + ... + 195907.

It is an arithmetic number, because the mean of its divisors is an integer number (4699944).

Almost surely, 2^30157897 is an apocalyptic number.

It is an amenable number.

30157897 is a deficient number, since it is larger than the sum of its proper divisors (7441655).

30157897 is a wasteful number, since it uses less digits than its factorization.

30157897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391679.

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 30157897 is about 5491.6206169035. The cubic root of 30157897 is about 311.2674333122.

The spelling of 30157897 in words is "thirty million, one hundred fifty-seven thousand, eight hundred ninety-seven".