30190640 has 80 divisors (see below), whose sum is σ = 75530880. Its totient is φ = 11182080.

The previous prime is 30190627. The next prime is 30190663. The reversal of 30190640 is 4609103.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×30190640² = 1822949487219200, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 107300 + ... + 107580.

It is an arithmetic number, because the mean of its divisors is an integer number (944136).

Almost surely, 2^30190640 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 30190640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37765440).

30190640 is an abundant number, since it is smaller than the sum of its proper divisors (45340240).

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

30190640 is a wasteful number, since it uses less digits than its factorization.

30190640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390 (or 384 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 30190640 is about 5494.6009864229. The cubic root of 30190640 is about 311.3800422176.

Adding to 30190640 its reverse (4609103), we get a palindrome (34799743).

The spelling of 30190640 in words is "thirty million, one hundred ninety thousand, six hundred forty".