30349830 has 64 divisors (see below), whose sum is σ = 85206528. Its totient is φ = 6773760.

The previous prime is 30349807. The next prime is 30349831. The reversal of 30349830 is 3894303.

It is a happy number.

It is a super-2 number, since 2×30349830² = 1842224362057800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30349831) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7350 + ... + 10710.

It is an arithmetic number, because the mean of its divisors is an integer number (1331352).

Almost surely, 2^30349830 is an apocalyptic number.

30349830 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 30349830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42603264).

30349830 is an abundant number, since it is smaller than the sum of its proper divisors (54856698).

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

30349830 is a wasteful number, since it uses less digits than its factorization.

30349830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3421.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 30349830 is about 5509.0679792502. The cubic root of 30349830 is about 311.9263674037.

The spelling of 30349830 in words is "thirty million, three hundred forty-nine thousand, eight hundred thirty".