30420691 has 16 divisors (see below), whose sum is σ = 36904960. Its totient is φ = 24494400.

The previous prime is 30420683. The next prime is 30420721. The reversal of 30420691 is 19602403.

It is not a de Polignac number, because 30420691 - 2³ = 30420683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30420491) 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 15 ways as a sum of consecutive naturals, for example, 15991 + ... + 17791.

It is an arithmetic number, because the mean of its divisors is an integer number (2306560).

Almost surely, 2^30420691 is an apocalyptic number.

30420691 is a deficient number, since it is larger than the sum of its proper divisors (6484269).

30420691 is a wasteful number, since it uses less digits than its factorization.

30420691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1954.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 30420691 is about 5515.4955353078. The cubic root of 30420691 is about 312.1689413511.

It can be divided in two parts, 304 and 20691, that multiplied together give a square (6290064 = 2508²).

The spelling of 30420691 in words is "thirty million, four hundred twenty thousand, six hundred ninety-one".