30840055 has 8 divisors (see below), whose sum is σ = 38008512. Its totient is φ = 24005088.

The previous prime is 30840053. The next prime is 30840101. The reversal of 30840055 is 55004803.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 30840055 - 2¹ = 30840053 is a prime.

It is a super-2 number, since 2×30840055² = 1902217984806050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30840053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83167 + ... + 83536.

It is an arithmetic number, because the mean of its divisors is an integer number (4751064).

Almost surely, 2^30840055 is an apocalyptic number.

30840055 is a deficient number, since it is larger than the sum of its proper divisors (7168457).

30840055 is a wasteful number, since it uses less digits than its factorization.

30840055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166745.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 30840055 is about 5553.3823027053. The cubic root of 30840055 is about 313.5968665900.

Adding to 30840055 its reverse (55004803), we get a palindrome (85844858).

The spelling of 30840055 in words is "thirty million, eight hundred forty thousand, fifty-five".