30139408 has 40 divisors (see below), whose sum is σ = 64245888. Its totient is φ = 13610112.

The previous prime is 30139393. The next prime is 30139427. The reversal of 30139408 is 80493103.

It is an unprimeable number.

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, 8235 + ... + 11317.

Almost surely, 2^30139408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30139408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32122944).

30139408 is an abundant number, since it is smaller than the sum of its proper divisors (34106480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30139408 is a wasteful number, since it uses less digits than its factorization.

30139408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3151 (or 3145 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 30139408 is about 5489.9369759588. The cubic root of 30139408 is about 311.2038103960.

It can be divided in two parts, 3013 and 9408, that added together give a palindrome (12421).

The spelling of 30139408 in words is "thirty million, one hundred thirty-nine thousand, four hundred eight".