30639874 has 8 divisors (see below), whose sum is σ = 47080908. Its totient is φ = 14946240.

The previous prime is 30639871. The next prime is 30639877. The reversal of 30639874 is 47893603.

It is an interprime number because it is at equal distance from previous prime (30639871) and next prime (30639877).

It can be written as a sum of positive squares in 2 ways, for example, as 29235649 + 1404225 = 5407^2 + 1185^2 .

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

It is not an unprimeable number, because it can be changed into a prime (30639871) 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 3 ways as a sum of consecutive naturals, for example, 186747 + ... + 186910.

Almost surely, 2^30639874 is an apocalyptic number.

30639874 is a deficient number, since it is larger than the sum of its proper divisors (16441034).

30639874 is a wasteful number, since it uses less digits than its factorization.

30639874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373700.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 30639874 is about 5535.3296198149. The cubic root of 30639874 is about 312.9168802142.

It can be divided in two parts, 30639 and 874, that added together give a palindrome (31513).

The spelling of 30639874 in words is "thirty million, six hundred thirty-nine thousand, eight hundred seventy-four".