30690055 has 16 divisors (see below), whose sum is σ = 40479264. Its totient is φ = 22151680.

The previous prime is 30690043. The next prime is 30690059. The reversal of 30690055 is 55009603.

It is a happy number.

It is not a de Polignac number, because 30690055 - 2¹⁵ = 30657287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30690059) 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, 5499 + ... + 9571.

It is an arithmetic number, because the mean of its divisors is an integer number (2529954).

Almost surely, 2^30690055 is an apocalyptic number.

30690055 is a deficient number, since it is larger than the sum of its proper divisors (9789209).

30690055 is a wasteful number, since it uses less digits than its factorization.

30690055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4226.

The product of its (nonzero) digits is 4050, while the sum is 28.

The square root of 30690055 is about 5539.8605578119. The cubic root of 30690055 is about 313.0876154400.

Adding to 30690055 its reverse (55009603), we get a palindrome (85699658).

The spelling of 30690055 in words is "thirty million, six hundred ninety thousand, fifty-five".