30591842 has 6 divisors (see below), whose sum is σ = 45899499. Its totient is φ = 15292010.

The previous prime is 30591811. The next prime is 30591893. The reversal of 30591842 is 24819503.

It can be written as a sum of positive squares in only one way, i.e., 15295921 + 15295921 = 3911^2 + 3911^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3911.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30591799 and 30591808.

It is an unprimeable number.

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 2 ways as a sum of consecutive naturals, for example, 5867 + ... + 9777.

Almost surely, 2^30591842 is an apocalyptic number.

30591842 is a deficient number, since it is larger than the sum of its proper divisors (15307657).

30591842 is an frugal number, since it uses more digits than its factorization.

30591842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7824 (or 3913 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 30591842 is about 5530.9892424412. The cubic root of 30591842 is about 312.7532820188.

Multiplying 30591842 by its sum of digits (32), we get a square (978938944 = 31288²).

The spelling of 30591842 in words is "thirty million, five hundred ninety-one thousand, eight hundred forty-two".