30849078 has 32 divisors (see below), whose sum is σ = 67447296. Its totient is φ = 9348768.

The previous prime is 30849047. The next prime is 30849079. The reversal of 30849078 is 87094803.

It is a super-2 number, since 2×30849078² = 1903331226900168, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30849079) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2275 + ... + 8177.

It is an arithmetic number, because the mean of its divisors is an integer number (2107728).

Almost surely, 2^30849078 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30849078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33723648).

30849078 is an abundant number, since it is smaller than the sum of its proper divisors (36598218).

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

30849078 is a wasteful number, since it uses less digits than its factorization.

30849078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5988.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 30849078 is about 5554.1946310874. The cubic root of 30849078 is about 313.6274470437.

The spelling of 30849078 in words is "thirty million, eight hundred forty-nine thousand, seventy-eight".