30420157 has 8 divisors (see below), whose sum is σ = 32318136. Its totient is φ = 28534272.

The previous prime is 30420119. The next prime is 30420161. The reversal of 30420157 is 75102403.

It can be written as a sum of positive squares in 4 ways, for example, as 1572516 + 28847641 = 1254^2 + 5371^2 .

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 30420157 - 2¹¹ = 30418109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30420107) 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 7 ways as a sum of consecutive naturals, for example, 2463 + ... + 8179.

It is an arithmetic number, because the mean of its divisors is an integer number (4039767).

Almost surely, 2^30420157 is an apocalyptic number.

It is an amenable number.

30420157 is a deficient number, since it is larger than the sum of its proper divisors (1897979).

30420157 is a wasteful number, since it uses less digits than its factorization.

30420157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6047.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 30420157 is about 5515.4471260270. The cubic root of 30420157 is about 312.1671147523.

The spelling of 30420157 in words is "thirty million, four hundred twenty thousand, one hundred fifty-seven".